Tuesday, June 8, 2010

Audemars Piguet Jules Audemars Tourbillon Chronograph White Gold


The Audemars Piguet Jules Audemars Tourbillon Chronograph enjoy is really a masterpiece of watchmaking art. This stunning timepiece links a common wheel controlled chronograph using the tourbillon, the a single of one of the most most celebrated element in watchmaking. Tourbillon eliminates the effects of gravity upon the vertically held escapements.

The Audemars Piguet Jules Audemars Tourbillon Chronograph view is moved by an unusual manually wound mexhanism, which is known as the 2889/2005 Caliber. This solution features a power for 72 hours constant running. This movement consists of 286 elements, just about every of them is finished by hand. All steel parts are manually completed. Every one of the jewels and screws are scrupulously polished. Chamfered factors, and every single screw are polished a lot of times. The wheels and pinions in the different mechanisms are precisely properly concluded to present optimum longevity, function and also for aesthetic beauty.

The Audemars Piguet Jules Audemars Tourbillon Chronograph view functions a system which reveals the wonderful artifice employed inside the 2889/2005 Caliber. Jules Audemars is remerkable to operate, every single step is specifically coordinated while using column wheel. Audemars Piguet functions lovely exhibition through the sapphire caseback. This watch unveils the beauty in the magnificent tourbillon by means of an gap within the specifically detailed silver dial. This dial is accented by reduced hands of gold. It has also applied a Roman numeral hour markers. It's mounted on a bridge which edges are actually gently chamfered. The tourbillon device displays its delicate mechanism architecture with screw adjusted balance wheel. It beats at 21,600 vibrations per hour.

The scenario is manufactured of 18kt rose or white gold. It measures 41mm x 13mm and has double sapphire crystals.This exactly crafted classical round 18K circumstance displays a sizeable variation between brushed and polished surfaces, and its production demands extensive hand finishing.The Audemars Piguet Jules Audemars Tourbillon Chronograph watch is completed by a luxurious crocodile strap and an 18K gold deployant clasp whose shape takes the form in the Audemars Piguet initials.

Audemars Piguet Jules Audemars Tourbillon Minute Repeater Chronograph watch


The Audemars Piguet Jules Audemars Tourbillon Minute Repeater Chronograph view is really a superb example of haute horlogerie at its summit, both technically and aesthetically. By combining a hand-wound column-wheel controlled chronograph with two of essentially the most tough complications in watchmaking, Audemars Piguet has created a stunningly gorgeous luxury timepiece for one of the most discriminating of collectors and aficionados.
The tourbillon and also the instant repeater have prolonged represented the very essence of brilliant watchmaking. The former, invented at the turn of the 19th century, is an ingenious and technically elaborate device which sought to greatly decrease the effects of gravity upon the vertically oriented escapement of pocket watches; meanwhile, the second repeater utilizes an really intricate system which is in a position to translate the position of the hands into a series of coordinated and perfectly tuned chimes that indicate the several hours, quarter hours, and person minutes, at any time that the slide lever is activated. In the time preceding electric light or illuminated view displays, the minute repeater enabled a gentleman to discreetly tell the time by sound alone; although an earlier invention than the tourbillon, the minute repeater also reached its technical zenith through the 19th century.
Audemars Piguet has lengthy had their hand within the development of those remarkable complications, being a specialist within the finest watchmaking approaches due to the fact the company's earliest beginnings in 1875. The breathtaking Jules Audemars Tourbillon Moment Repeater Chronograph enjoy pays respect to Jules-Louis Audemars who co-founded the corporation. Just about every of those limited production timepieces is crafted exclusively from 18K gold or platinum, inside a massive 43mm situation which displays finely brushed surfaces and elegant polished contrasts atop the bezel, and caselugs.
The stunning dials with the Audemars Piguet Jules Audemars Tourbillon Second Repeater Chronograph view, show an intricate guilloche pattern which radiates in a very fan-like pattern from the center on the dial, and is set off by classy Roman numerals and leaf hands, all crafted from solid gold, and finely hand polished. The aperture at six o'clock shows the tourbillon cage, mounted on a polished steel bridge; its freely sprung balance functions weighted screws, and beats at a pace of 21,600 vibrations per hour; just about every minute, the tourbillon cage completes a single revolution. Turning this exquisite Audemars Piguet timepiece on its backside reveals a movements that is in total accord with the highest degree of haute de gamme craftsmanship. All bridges are decorated with hand-applied Cotes de Geneve patterns, even though the man or women steel elements exhibit edges which are actually meticulously chamfered and polished. Screw and jewel settings are countersunk, and each of they are also cautiously polished.
By operating the chronograph system, the exceptional refinement of this exclusive and very complex Audemars Piguet movements might be very easily felt; in the same time its functions will fascinate lovers of mechanical watchmaking, as the precise advances in the column-wheel could be clearly admired. Equally captivating, are the hammers in the minute repeater which might be noticed striking the gongs whenever the instant repeater is activated. Caused by its specialized intricacy, and the consequent demands it spots upon the master watchmakers capable of making it, only a handful of those Audemars Piguet watches will leave the workshop in Le Brassus, Switzerland each and every year. Just about every Audemars Piguet Jules Audemars Tourbillon Second Repeater chronograph observe is completed by a fine hand-sewn and remborded crocodile strap equipped using a folding clasp in gold or platinum, elegantly shaped like the Audemars Piguet initials.

Monday, June 7, 2010

Mulliner Tourbillon for Bentley

Mulliner, the jewel from the crown with the Bentley factory in Crewe..
. Behind the closed doors of this prestigious workshop, a hundred or so craftsmen and technicians lavish the utmost care on fulfilling the best certain wishes of Bentley owners. Embodying a blend of technologies and tradition, commissioning is taken to its ultimate conclusion.



This spirit of exclusivity has offered rise to an extraordinary timepiece, the Mulliner Tourbillon chronograph. A uncommon and indeed highly uncommon model, considering that only a couple of dozen is going to be created more than the subsequent handful of years, at a rate of two per month. Although exclusivity happens at a cost, it also brings its share of privileges, considering that every single Mulliner Tourbillon is customized by its future proprietor. According to his personalized preferences, he can select the sort of event – in platinum or in yellow, rose or white gold – the dial colour or even the exact shade on the crocodile leather strap. Even the treasured wood decoration around the back of the check out arrives in a very decision of six varieties of veneer.



This masterpiece also has an exceptional heart inside shape of hand-wound Breitling Caliber 18B, a Tourbillon chronograph movement exclusive to “Breitlingfor Bentley”.



The tourbillon is usually a superior mechanism constituting certainly one of the most ingenious mechanical watch complications: the stability, balance-spring and escapement are contained inside of a carriage spinning on its axis, a construction which compensates for your variations in rate that occur when a enjoy is in a vertical position.



This is not the only particular feature of this system: its “30-second” kind chronograph mechanism is distinguished by its central hand revolving close to the dial in half a minute instead of the typical 60 seconds; this apparently surprising configuration enables extremely precise read-off for the fractions of the second, in this event 1/6ths. It can be endowed using a 15-minute totalizer and also a pointer-type date display.





Just about every automobile that emerges from the Mulliner workshops is one of a kind... and such is likewise correct of just about every Mulliner Tourbillon, thus guaranteeing its operator the certainty that he will under no circumstances see an identical observe. Under no circumstances!

Every single hour-marker on the dial is fashioned from organic hand-crafted mother-of-pearl. A perform of genuine artistry.

Both actually and figuratively, each and every Mulliner Tourbillon carries the hallmark of its seller, such as his initials engraved on certainly one of the motion bridges.

Protected by a sapphire crystal, the important wooden ring is accessible in the same shades and veneers as the Bentley Mulliner trim: burr walnut, dark stained burr walnut, madrona, birds eye maple, burr oak, olive ash.

The countless approaches of personalising a Mulliner Tourbillon chronograph are directly inspired by individuals provided by the Bentley Mulliner workshops in Crewe.



•Breitling Caliber 18B with tourbillon regulating system.
•Hand-wound.
•30-second chronograph function.
•Pointer-type date display.
•Chronometer-certified by the COSC.

Audemars Piguet Millenary Carbon One Tourbillon Chronograph


Sporting standard for that Millenary selection proportions and shape, the watch nevertheless seems like the IBM Roadrunner near the Apple Macintosh 128K when in comparison to standard models. Perfectly, nearly.

The purpose just isn't only its one-minute tourbillon complication that may be itself a technical marvel, but also the option of materials employed. In comparison towards standard steel, and gold, and, from time to time, platinum, the wide use of forged carbon (case, movement mainplate,) ceramic (bezel, crown and chronograph pushpieces) and titanium (caseback cover) makes it look… Hm… Nicely, naturally, it doesn’t appear beautiful, nevertheless it seems to be a great decision for your Terminator. Not to the clumsy T-600 or the liquid-metal T-1000, but for that much more humane T-850 series (Okay, I understand that the guy prefers the special-edition Royal Oak Offshore.)

Its skeletonized dial layout with contrasting gray, white and red components looks as well busy and, judging by real-life wrist-shots, makes the tiny hour and minute hands disappear from the intricate mesh of gears, barrels plus the tourbillon carriage. So far, this can be among the least legible skeletonized watches I've ever noticed.

Specifications:

Movement: AP 2884, hand-wound, twin-barrel mainspring, 30 jewels, 336 parts, 21,600 vph, 9.7 mm high, 38.4 mm in diameter


Complications: Chronograph, one-minute tourbillon

Power reserve: 240 hours (10 days)

Case material: Forged carbon

Bezel material: Black ceramic

Case shape: Ovoid

Transparent case back: Yes, sapphire caseback

Case size: 47.0 x 42.0 mm

Dial: Black and white with red elements, skeletonized

Hands: Stainless steel, black with luminescent substance

Strap: Crocodile leather

Crystal: Sapphire, anti-reflection coated

Water resistance: 20 meters

Audemars Piguet Royal Oak Carbon Concept Tourbillon and Chronograph

Audemars Piguet is proud to introduce the Royal Oak Carbon Strategy Tourbillon and Chronograph. The ultra-light enjoy is destined to come to be the first timepiece to feature a carbon event and motion. The novelty is equipped while using superior 384-part Calibre 2895 tourbillon chronograph movements.

The Audemars Piguet specialists have opted for forged carbon to clothe the circumstance middle of the watch. Forged carbon is widely applied within the aviation industry for that production of large-sized components. Audemars Piguet is becoming the 1st corporation to have utilized the substance for making tint-sized look at elements.

The signature bezel with the Royal Oak, the pushpieces and crown are crafted in ceramics. The crown capabilities the AP initials. The ring surrounding the caseback is secured by eight exclusively created screws created from PVD blackened titanium.

The exclusive hand-wound 34-jewel Audemars Piguet Calibre 2895 combines a tourbillon, a chronograph along with a twin-barrel method to offer a 237-hour strength reserve.

Exclusive Movements
The mainplate of the watch's activity is made of carbon, even though the central bridge is developed from green eloxed aluminium. About the caseback side, there are black PVD-coated bridges. The control and coupling levers are black PVD-coated in relief and further improved with a hand-drawn metal-coloured rim.

The two power-reserve cones are clothed in an amorphous carbon coating, the same as the inserts inside the openworked zones at 6 and 12 o'clock. The unusually designed tourbillon carriage comprises over 70 elements with weight of just 0.45 grams and is treated to a two-tone black PVD and steel finish.

The dial on the Royal Oak Carbon Principle Tourbillon functions the following details:

luminescent hour-markers and white minute markers,

openworked luminescent central hour and moment hands,

a power-reserve indicator positioned at 12 o'clock,

a selection indicator at 6 o'clock,

a central chronograph sweep seconds hand,

a linear chronograph moment counter.
The timepiece is secured on the wrist having a hand-sewn alligator leather strap with substantial square scales, fitted with an AP folding titanium clasp.

Thursday, June 3, 2010

Audemars Piguet Tourbillon Millenary Calcédoine Watch


Another timepiece not in-line with the times, but perhaps it is. Sure ultra luxury watches are not en vogue given the economy, but then again at least they are straight forward with why they are expensive. People feel more comfortable paying luxury prices for clear luxury items. The alternative are $100,000 sport watches that most people would never notice as being so "valuable."
This is the Audemars Piguet Millenary Calcedoine (Chalcedony) watch and it serves up some of the most popular luxury features in a watch. You have an 18k pink gold case that is 45mm wide by 40mm tall. You have a stunning array of 395 brilliant-cut diamonds placed all over the case and in the dial was well. You have a beautifully decorated and designed open-work in-house made Audemars Piguet Calibre 2861 manually-wound tourbillon movement - with a chalcedony mainplate. And you have a galuchat (stingray) strap. It just oozes "my Tahitian vacation home is more expensive than you primary south Florida residence plus four children's Ivy league educations combined!"
Aside from diamonds, arabesque engravings decorate the movement while the tourbillon escapement is visible to the left of the watch face itself ( that is surprisingly legible). I am sure that Audemars Piguet will not be making too many of these watches for men - no, maybe they are for women - but contact them and I am sure they will put your name on an arbitrarily long waiting list as well as inform you of "what the damage" will be.

Audemars Piguet Millenary MC12 Tourbillon Chronograph




I am always curious as to what the thought process is when admirable watch makers design watches after cars. They never seem to look too much like the cars they are modeled after. this might be a bit of an exception as at least the colors match. Do you think that cars are ever modeled after watches? Maybe. Well this is the Audemars Piguet Tourbillon Watch. Let me unravel that name for a moment. The "Millenary" title alludes to the stlye of the case and the "MC12" name refers to the Maserati super car that the watch is based on. The MC12 is basically a race car, not even really sure if it is street legal. The MC12 is Masterati's version of the Ferrari Enzo. Then you have the tourbillon complication and the 30 minute chronograph. Audemars Piguet also throws in a power reserve indicator for the Calibre 2884 manually wound movement.



The open work style of the watch is a good intersection between modern and classic. Branding on the dial has Audemars Piguet and Maserati sharing the same size, which is interesting. Audemars Piguet is shorted to just "AP" and you have the Masterati Trident logo. The chronograph has a large central seconds hand with an easy to use tachymeter. The chronograph is also an monopusher chronograph meaning it is operated via a single button. Although the face of the watch is oblong, the dial itself is actually perfectly round. The Audemars Piguet Millenary MC12 Tourbillon Chronograph originally was released in about 2006 in a limited edition of just 150 pieces. The movement utilizes carbon which is part of Audemars Piguet's talents many other watch makers can't seem to replicate too well. I personally think that carbon is a bit gimmicky, but it is apparently very difficult to work in small sizes. The blued metal in the movement to match the blue of the car is a nice touch. The case of the Millenary is made of 950 platinum which makes it hefty and expensive. If you ever hear that a super car uses platinum, walk the other direction, it is a damn heavy material the opposite of "weight saving." Last of all you get a crocodile leather strap. Price? About $320,000. Lower than the original retail price though.

Wednesday, June 2, 2010

SEA-GULL Tourbillon Watch Introduction

For centuries a tourbillon watch has been considered one of the most complicated and hence exclusive timepieces. Only the world’s best watch makers are able to make their own tourbillon movements and as requirements of both the master watchmakers and the components used are very high the annual output of tourbillon watches remain very limited. A watch with tourbillon remains a manifestation of superior watch making craftsmanship and is a luxury available only to a selected audience.
SEA-GULL has developed its own tourbillion in-house in the tradition started by the French watchmaker Abraham-Louis Breguet, who invented the tourbillon watch in 1795. SEA-GULL tourbillion watches are made by its best master watchmakers and available in various designs that all reveal a deep respect for the tradition of fine watch making.
The tourbillion function consists of carriage, which makes the escapement and balance wheel turn 360 degrees every minute. By doing so, the tourbillon is able to even-out the physical forces, which impact the accuracy of the watch, mainly when placed in vertical position. SEA-GULL’s tourbillion is located at the 6 o’clock position and functions also as the second hand indicator. On all SEA-GULL tourbillon watches the fascinating tourbillion function is clearly visible through the scratch-resistant sapphire crystal on both front and back.
After more than 50 years of watch making history, the master watch makers at SEA-GULL have succeeded in developing a series of different tourbillon watches with various functions, such as: power reserve indicator, retrograde date and weekday, automatic winding, etc. SEA-GULL tourbillion watches are available in either steel or 18K rose gold, with superior quality alligator straps. Truly classical timepieces for collectors and connoisseurs who appreciate the art of fine watch making.

SEA-GULL tourbillon watches are made in small series and are engraved with unique serial numbers. Each watch is supplied in an exclusive box, providing due respect for each of these fine timepieces.

Why The Price of The Tourbillon Watches Are so High

There are several aspects that factor into the high tourbillon price.

One being that the tourbillon mechanism is made under extremely tight mechanical tolerances. For this reason, special tools and machinery are used in their manufacture. Exotic metals such as titanium and beryllium known for their durability and light weight are used in the tourbillon regulator. It is often asked why they build cages as fine as cobwebs? Is the finesse of its cage built for show and the admiration of connoisseurs? No. The moment of inertia of the tourbillon cage must be reduced to a minimum and consequently, it cannot have much weight or friction. One has to remember that the same energy supplied by the watch's mainspring to move all the moving gears is also responsible to move the tourbillon. Any disturbance in the functioning of the tourbillon will effectively affect the accuracy of the watch.

Another reason attributing to the tourbillon price is timing and adjustment. Timing and adjustment of a tourbillon equipped watch is also extremely complex and time consuming. Each regulation of the balance, for instance, requires disassembly of the tourbillon. All of these are factored into the cost of a tourbillon watch.
Yet another reason for the high tourbillon price is the number of parts needed in the tourbillon. The escapement of the tourbillon is comprised of many tiny moving parts and they must all work in concert to produce the seductive "dance" of the tourbillon. See structure of the tourbillon. IWC's "Il Destriero Scafusia" model demonstrates the complexity of the mechanism. It is composed of approximately 100 parts and weighs only 0.296 grams.

As in days gone by, very few watch houses today have the time, capital, and experience to produce tourbillon watches and those that do, only produce a few dozen pieces a year. And in those select houses, only particularly skilled watchmakers can carry out the manual production of a tourbillon watch. The price for such a horological tour de force derives from its high research and development costs, the extremely small number of specimens produced, the esteem it deserves, and, of course, the number of watch lovers eager to acquire one (supply and demand). With the demand vs. supply curve skewed, the costs for tourbillon watches naturally go up. These are yet other factors that go into the high tourbillon price.

A less tangible and less obvious reason for the high tourbillon price is due to the economic landscape of mechanical watches. Since the price of high end mechanical wristwatches increased 300% in the late 1980s, the Swiss watch industry has settled down into a comfortable price-fixing monopoly. The situation has been complicated of late as watch companies have consolidated into groups with the power to control distribution channels. With this power comes the power to wield controls on pricing of wristwatches.

Breguet Tourbillon and Abraham Louis Breguet

Born in Neuchâtel, Switzerland on January 10, 1747, Abraham Louis Breguet secured his position in history as the father of watchmaking through his creations and technical wizardry. At an early age, he traveled to Versailles and Paris to study about clock making. At the time, the French King Louis the XVI attracted talent that was the best in virtually every field of technique and art. After spending 13 years as an apprentice and following his marriage to the daughter of a prosperous French bourgeois (her dowry provided the "financing" which allowed him to open his own workshop), he founded the Breguet Company in 1775 in the Île de la Cité, Paris. The relationships Breguet had made with scholarly people during his apprenticeship as a watchmaker soon paid off with spectacular results. Following his appearance to the court, whereupon Queen Marie-Antoinette is said to have grown fascinated by Breguet's novel self-winding watch, King Louis XVI bought several of his watches. He presented one of them to the mariner Bougainveille, who was in the process of organizing his great expedition to the North Pole.

Word spread and very soon kings, princes, and European aristocrats were buying his watches. Breguet became a household name in Europe during the 18th to 19th century and the name stuck as a common reference for timepieces, just like FedEx for courier service or Kleenex for napkins. From 1793 to his death in 1823, Breguet proved himself to be quite the technical genius that he was and he continuously enhanced his technical abilities and created many important inventions. In short order, he perfected the self-winding movement invented by Abraham Louis Perrelet in 1770; invented the overcoil balance spring which is known by his name today; came up with Breguet hands and Breguet numerals, invented shock resistance for balance bearings (prior to this, most pocket watches were badly damaged if they fell to the floor); built the first watches with perpetual calendar and moonphase indication, developed la repetition, a repeating pocket watch which chimed on demand (back in those days it was necessary to tell time in the dark); and perfected extra flat watches. His labor culminated in the grand finale of his work: the Tourbillon (1801).

In his application for a patent, the famous watchmaker lists several advantages of the tourbillon, which he summarizes below:

"By means of this invention, I have succeeded in cancelling through compensation the anomalies caused by the different positions of the centres of gravity of the regulator movements, to distribute frictions on all parts of the circumference of this regulator's pivots and of the holes in which these pivots move. This is to allow the oiling of the friction surfaces to always be even, in spite of oil coagulation, and finally to cancel many other causes of error influencing movement accuracy. This could only be attained until now by constant trial and error and often even without any certainty of success."

Through these inventions, Breguet secured the success of his firm under the rule of two Bourbon kings, three governments of the First Republic and the reign of Napoleon. In fact, Napoleon was one of his most loyal customers.
An amusing story is told in which Napoleon, while in the heat of battle, wanted to see the time on his pocket watch right away, without sacrificing the benefits of the cover. So, right then and there, Napoleon unceremoniously cut a small viewing hole in the front cover. This gave him an unobstructed view of the face and hands! And so the half-hunter pocket watch was born.
Of all his inventions, perhaps the invention Breguet is most famous for is the tourbillon. Even with today's advanced technology, the tourbillon can only be built by the most skilled watchmakers. Breguet theorized that the effects of gravity on a pocket watch (pocket watches were almost always carried vertically) led to deviations in timekeeping. He wanted to rule out all differences of position with the tourbillon.
Consequently, he developed what was essentially a small "clock within a clock", meaning that the balance and escapement turned on a common axle within a revolving cage once a minute, for example. This elminated most deviations caused by differences in position and allowed many watches to attain chronometer-like accuracy.
But in actuality, was Breguet right in saying that by placing the escapement and balance wheel in a cage that rotates continuously, his tourbillon equipped watch balances out the effects of gravity, thus achieving greater accuracy? Let's see...
The escapement of a watch placed in the horizontal plane ("pendant up" or "dial up" positions) will have little variations in the frequency of its balance wheel as the changes in the escapement's center of gravity are negligible. Therefore, one can deduce that the tourbillon does not correct the rate variations in the horizontal position; in fact, Breguet was careful not to say this in his application for a patent. On the other hand, a watch placed in the vertical positions (crown left; right; down; or up) may have zero to large variations in the frequency of its balance wheel as a result of changes in the escapement's center of gravity. Thus, for example, in vertical position one, the watch may have a variation of 2 seconds/day, in vertical position two, 4 seconds/day, and yet in vertical position three, 0 seconds/day. As a result, a watch laid flat at night and always placed in the same vertical position during the day does not provide better results when equipped with a tourbillon. It's more the contrary that is true, because in a vertical position the tourbillon watch gives an average rate while the watch without a tourbillon gives only the rating result corresponding to the position it occupies.

The possible advantage of the tourbillon then manifests only if the watch without tourbillon remains in any one vertical position during the day. The performance advantage is even further nullified by the fact that wristwatches spend a less predictable amount of time in less predictable positions. The actual moving of your wrist acts as a tourbillon for your wristwatch! When you wear them, they occupy an infinite variety of positions and their rating results give an average of this constant motion.
Breguet was correct in observing that the regular functioning of a watch was influenced to a great extent by the watch's position. Therefore, he concluded that the cause of such variations was due to the effects of gravity on the escapement and he mentions this in his patent application. However, it never occurred to him that perhaps these variations were due to some components in a watch's movement. 19th century Breguet constructed watch components of such high level that he considered (but was only partly right) the perfect balancing of balance wheel and balance spring to be a given. Eventually it was discovered that the real problem was the balancing of the balance wheel and, only in second place, its friction. For a watch's operation to be consistent (i.e. "accurate"), the balance wheel must be perfectly round and poised (i.e., in balance, without heavy points on the wheel) and the spring must extend and contract symmetrically from the exact center of its coil.

Of greater importance to watchmaking at the time of the tourbillon's development, was that Breguet's invention produced watches requiring less frequent maintenance. Because 19th century portable watches were almost exclusively pocket watches, they were frequently carried in coat vest pockets and held constantly in a vertical position. Carried in this fashion, the balance wheel pivot rested only on one side of its seat and consequently, friction - which was considerable given the materials used, the internal surface finish, and the lubricants adopted at the time - caused a strong wear on both seat and pivot and made frequent servicing necessary.

In a letter addressed to his son, Breguet wrote:
I succeeded in elminating the anomalies due to the different positions of the center of gravity and movements of the balance, by distributing the function over all the pieces of the balance and pivot holes, so as to assure an equal lubrication of the friction surfaces.
The innovation introduced by Breguet, consisting of a continuous rotating cage supporting the balance wheel and escapement, allowed distribution wear over the whole circumference of seat and pivot to achieve better lubrication results and assured a more regular working performance. However, nowadays, with the development of advanced lubricants and better surface finishing of watch components, the need for a tourbillon for watch maintenance is rather a moot point.

Monday, May 31, 2010

Debate About Tourbillon

H. Bouasse, professor at the Science Faculty of Toulouse, France, adds fuel to the tourbillon controversy, in which he writes in his book "Pendule, Spiral Diapason": "In order to cancel the centering errors of the balance, someone had the ingenious idea of making it turn: this resulted in the tourbillon escapement, but its high price and problematic advantages reduced it to being a historical curiosity...Experience shows that in the end, the use of this "perfected" system involves considerable costs. It is ingenious but far too complicated."

In fact, energy distribution in a watch is carried out during the rotation of the escape wheel. For a tourbillon-equipped watch, it is at that moment too that the tourbillon cage turns. It consumes a great deal of energy to start the cage moving and hardly is it launched then it stops suddenly against the escapement pinion whose wheel has just come to rest. The faster the tourbillon cage turns, behold the more spectacular its operation and the more it consumes energy at a loss. It can be argued that the tourbillon is an additional mechanism, a parasitic mechanism, that consumes energy taken from the mainspring destined to the balance and balance spring. As a result, the balance with less energy will have reduced advantages. On the whole tourbillon watches time less well than conventional watches of the same size, yet another aspect in the tourbillon controversy.

Nowadays, with the precision of quartz watches and radio controlled or atomic watches whose accuracy is ± 1 second every 1 million years, it begs the question of what "purpose" such a device now serves. While the tourbillon regulator was probably of greatest benefit to an escapement whose function saw use mainly in the vertical positions, such as in a pocket watch, its value to the performance of escapement in conventional wristwatches is arguably dubious, furthering the tourbillon controversy. Still, it is clear that the tourbillon was never intended by its inventor to be a practical and common answer for everyday timekeeping, and to criticize it because of this is missing the point. The tourbillon exists for the same reason that Formula 1 racing cars exits - not because it is something we need, but as a demonstration of the edge of the envelope - the forward edge of man's technical creativity and skill.

The tourbillon therefore, doesn't really serve a practical purpose... It serves an aesthetic need.

Tourbillon Timeline and Some Popular Tourbillon Watches

The timeline of the tourbillon began with the pocketwatch. The tourbillon regulator made the jump to wristwatches in 1930, when the watch company LIP makes the first wristwatch with a Tourbillon. Renowned watch houses such as Patek Philippe and Audemars Piguet, and of course Breguet followed suit with their first tourbillon wrist models. About the late '60s something foreboding occurred. This was the start of a period of watch manufacturing that is heralded as the most difficult crisis ever experienced by the Swiss watch industry - the advent of the quartz oscillator.

However, even as some watch companies tanked, the watchmakers continued to produce mechanical marvels and hard times was experienced for the next decade or so. Yet the romance of the tourbillon regulator was such that it was being produced again in the very first years of the mechanical revival - the ultrathin automatic winding hammer tourbillon wristwatch from Audemars Piguet in 1986 (Last published retail US $37,000).


In fact, some credit this watch for starting the mechanical watch renaissance. What made this watch so unique and exciting was that this was the first production tourbillon with automatic winding, and the tourbillon was the smallest ever produced, having a diameter of only 7.2mm and a height of 2.5mm. It also boasts a cage made of titanium for the first time and an automatic winding hammer made out of platinum-iridium alloy, an extremely dense yet heavy material. Another novel aspect is that the movement itself is the case - a design that shaved precious millimeters off the total thickness of the case. It was the "ancestor" of many of the modern tourbillon wristwatches.

However, its winding efficiency was not as high as Audemars Piguet had hoped, and so their rather daring pride in not allowing manual winding created some running problems. As a daily wear, for most lifestyles, it was prone to stop running simply due to the mainspring not being wound enough. In 1991, Audemars Piguet added a power reserve indicator and date on this complication. In 2002, they created the Royal Oak Concept Watch (around US $192,000) to celebrate the 30th anniversary of the Royal Oak.

More than two years in the making, this futuristic watch houses a tourbillon with titanium hand winding movement and dynamograph. The watch features a unique power reserve display that displays the remaining going barrel revolutions rather than hours as is displayed in most power reserve watches. The up-down indicator on the right shows how many more times the barrel will continue to rotate before it runs out of steam. Each of the revolutions, from 0 to 12, allows a reserve power of 6 hours meaning a total of 72 hours when it is fully wound (pointer reaches graduation 12).

The sophisticated dynamograph, set at 12, allows a clear display of the torque supplied by the mainspring. The dynamograph lets the mainspring of the watch to be maintained within ideal winding limits by indicating exactly when the movement should be rewound. In fact, power flow from the mainspring is not linear - above average when the mainspring is tightly wound and tapering off gradually towards the end.

A winding gauge on the barrel determines the position of the dynamograph needle on the dial. This supplies the wearer with immediate information about the current mainspring stress and power. The dynamograph provides a qualitative suggestion of how to achieve greater precision by maintaining the tension of the barrel spring through the rewinding of the movement when appropriate. Rewinding the movement when the needle moves beyond the zone of ideal stress shown on the indicator keeps the watch at peak time-keeping precision. The tourbillon cage itself is mounted on titanium shock absorbers - shock resistant to multiple g's well beyond the shock tolerance of the human body.

Another innovative feature is the watch's winding and hand-setting system: a special push-piece lets the wearer choose among the crown's several functions ("wind," "set," and "neutral"). This means that it's no longer necessary to extract the crown when the wearer wants to wind the mainspring or set the hands. Also, after the push-piece has commanded the crown to assume the "neutral" position, the crown is entirely uncoupled from the gear train. A designated display on the dial indicates the crown's momentary status. The Concept Watch is crafted from alacrite 602, an exceptionally resistant super-lightweight alloy with hardness of 430 Vickers widely used in aerospace and energy production and it marks the first application in wristwatch production.

Since the introduction of the Audemars Piguet Tourbillon 1, there has been a cornucopia of tourbillon wristwatches, and complicated wristwatches with tourbillon regulators.

One of the earliest artistic applications of the tourbillon regulator is in the Tourbillon Sous Trois Points d'Or, or Tourbillon Under 3 Gold Bridges first created by Constant Girard-Perregaux in 1867 for pocket watches. The three bridges hold the barrel, the train, and the balance. The Tourbillon Under 3 Gold Bridges is a stunning rendition of supreme watchmaking technique that exemplifies horology's highest ideals, with its bold clarity and unabashed richness, lyrically merging complexity with simplicity.

The original tourbillon was so complicated that Constant Girard-Perregaux had been able to construct only 20 such devices during a quarter century of work. The original tourbillon chronometer won a first class rating and a prize from the Neuchâtel Observatory. In the 1970s, the relatively small Girard-Perregaux manufacture decided to revive the fabled three-bridge tourbillon as a pocket watch. Before that could be done, however, the firm needed to purchase a large number of 19th and 20th century GP watches from King Farouk of Egypt. The king's collection included a number of models for which they no longer had either the tools or construction plans. Further, GP, possessing no diagrams or plans depicting the antique watches, was forced to study and meticulously measure one of Constant Girard-Perregaux's original chronometer tourbillons. It isn't hard to imagine the difficulties confronting the modern experts: Each of the 19th century tourbillons was a unique work of high-craftsmanship - custom-built from non-standardized parts that were assembled to harmonize with each other. Back then, no one was thinking about serially produced interchangeable parts. Furthermore, the 20th century watchmakers needed to learn old and largely forgotten skills, so that some of the new components could be finished with an 18th century wooden guilloch¡§¦ machine.

Adaptation of this unique eye-catching design to wristwatches occurred in 1991 and caused quite a stir. However, different from their tourbillon pocketwatches, the design engineers decided to invert the mechanism before installing it in a wristwatch case so that the painstakingly crafted bridges and the tourbillon cage would be visible on the dial side of the watch rather than hidden from view on its underside. As shown below, the movement having finely shaped symmetrical solid gold bridges, solid gold wheel train, and tourbillon is prominently displayed through the dial. The three milled gold bridges are so emphatically present on the dial that they steal the show from all of the other components. Even the dial's legibility is somewhat subsumed by the bridge's beauty.

Since then the concept of the Tourbillon Under 3 Gold Bridges has been applied to movements having variations such as hand-wound, hand wound with chronograph, one with a minute repeater that renders time audible, automatic with micro-rotor, and the ultimate, the Opera One (US $ 375,000) which features a carillon striking work that imitates the bells that chime at Westminister Cathedral in London. An Opera Two adds a perpetual calendar with date, day, month, and leap year to the Opera One. Another application of the tourbillon regulator was the flying tourbillon invented in Saxony, Germany in the 1920s by Alfred Helwig. While tourbillon carriages are normally pivot mounted on one side and bridged on the other, or bridged on both sides, the flying tourbillon's carriage is pivot mounted on one side with no supporting bridge to tie it down. This gives the tourbillon the impression that it is floating in mid-air thus voiding all gravitational pull. The flying type of tourbillon regulator is being produced by manufactures like Blancpain, IWC, and Glashutte Original, and independent watchmakers such as Vincent Calabrese.

The revived brand Blancpain has several flying tourbillon offerings that are included with chronographs, split-second chronographs, perpetual calendars, and rattrapante perpetual calendars. Some of their tourbillon models even have an eight days power reserve. With only the same number of turns of the crown required of a common 2 day movement, an 8 days power reserve can be achieved.

In the 1990s, Blancpain created the ultra-complicated Self-Winding Tourbillon Split-Seconds Flyback Chronograph watch (US $115,000). In 2001, Blancpain unveiled the Quattro platinum watch - an elegant self-wound timepiece housing a tourbillon regulator, perpetual calendar, flyback chronograph, and split-seconds chronograph (US $150,000). To celebrate Blancpain's original founding in 1735, a model aptly named the "1735" puts all that is possible in today's microtechnical industry in a diminitive amount of space. This one single wristwatch comprises an ultra flat movement outfitted with moonphase, tourbillon, perpetual calendar, split-seconds chronograph, minute repeater, and automatic winding (US $684,000).

A reverso watch housing a tourbillon regulator was launched by the prestigious watch manufacture Jaeger-LeCoultre in 1993. The legendary Reverso watch was first presented to the world in 1931 and was an immediate hit - and to this day, the Reverso model family is the most well-known product made by Jaeger-LeCoultre.

The solid gold case swivels to reveal the Jaeger-LeCoultre tourbillon. The tourbillon movement, caliber 828 is a manual winding movement with a 45-hour autonomy. The tiny tourbillon cage alone, weighing a mere 0.25 of a gram, carries seventy parts. As with all Patek Philippe tourbillon watches, on the finished watch, Jaeger-LeCoultre's tourbillon regulator is visible only through the caseback, ... but as it is a reversal, the wearer enjoys the privilege of presenting it in front at their own leisure. (US $65,000 for platinum version).

But Jaeger-LeCoultre's Gyrotourbillon I (US $275,000) that was unveiled in 2005 beats everything that has come out of the company until now: the watch combines a tourbillon with a perpetual calendar, a running equation of time, a double retrograde date display, and an eight-day power reserve. The tourbillon itself is made of two carriages to allow multi-directional rotation more suited to wristwatches than the pocket watches for which the tourbillon was invented. The external carriage, made of aluminum, turns every 60 seconds. The internal carriage, made of aluminum and titanium, turns every 24 seconds.

In 1795, Breguet invents the tourbillon. Then came the flying tourbillon invented in Glash¡§©ötte, Germany - a tourbillon with no bridge. In 1993, Mr. Kiu Tai Yu invents the mystery tourbillon - a tourbillon with no bridge, no carriage.

Born in 1946 in Soochow, China, Kiu Tai Yu, at an early age, discovered a talent for fixing broken watches and clocks. Friends and family would bring him heirlooms of great value to be repaired, and he memorized their mechanical structure and craftsmanship. Entirely self-taught, he built his first watch at the young age of 23. On his 45th birthday in 1991, Kiu Tai Yu astonished the horological world by making the first Asian tourbillon entirely on his own. The last time China made any impact on the horological world was about 10 centuries ago when Su Song, an imperial attendant was commissioned by the dragon throne to construct a time measuring instrument as a standard for the Celestial Kingdom. His ingenious solution was a water clock, the first timepiece ever to have a mechanical escapement, and is thus the direct ancestor of today's Rolex.

Mr. Kiu Tai Yu reduced the elaborate European tourbillon to its barest functional essentials in the Kiu Tai Yu Mystery Tourbillon. The escapement and balance are not housed in a rotating cage and its bridge (as in the traditional tourbillon), and without visible means of support. To create the illusion, Mr. Kiu Tai Yu suspends the balance wheel, with the balance spring underneath, from an invisible bar of crystal. Although Mr. Kiu Tai Yu has attended every Baselworld show since 1992 exhibiting his unique watches, sorry his watches aren't for sale. For Your Eyes Only!

In 1994, in celebration of Omega's 100th anniversary (1894-1994), Omega created the world's first Central Tourbillon wristwatch (US $40,000.00). For the first time, the tourbillon mechanism running at 21,600 vph holds a major place - in the center of the watch. The hour and minute hands are painted on two revolving sapphire discs. The gear mechanism for the sapphire discs is moved to the periphery of the dial, to make room for the escapement and tourbillon cage in the center, which itself carries the seconds hand the OMEGA symbol Ω. Due to the layout of the gear mechanism, the crown is used only for winding up the watch with time setting functions provided from a wheel on the back of the watch.

IWC's Da Vinci Tourbillon (US $59,000) combines a tourbillon, chronograph, perpetual calendar with date, day, month, four digit year display, and moon phase. The calendar will show an absolutely correct date until 2499 thanks to its "century disc."

The IWC 7 days Portuguese Tourbillon Mystere (US $89,000): The flying tourbillon seems to float freely above the black wheel that propels it.

Zenith presented its first tourbillon at Baselworld in 2004. Three years in the making, Zenith's El Primero Grande ChronoMaster XXT (US $104,000) combines a tourbillon with a chronograph and is the world's first and only tourbillon with a balance that beats 36,000 times per hour. The tourbillon is incorporated into an automatic chronograph movement and is encircled by a date ring that moves counter-clockwise.

The name "Frank Muller" is no stranger to watch enthusiasts. The meteoric rise that has characterized the Frank Muller brand in only one decade is without equal in recent watch history. Launched in 1992, Frank Muller's line of mechanical timepieces, marvelous both inside and outside, feature complex pieces as minute repeaters, perpetual calendars, and of course tourbillons. Among his more celebrated watches is the Tourbillon Revolution, introduced in 2002 to celebrate the tenth anniversary of the company. Protected by several patents, what makes this tourbillon watch so different and exciting is that with the simple push of a button on the case, the hour and minute hands sweep to the 12:00 position and like magic, the tourbillon cage rises from the movement level to literally hover over the dial for better viewing. The axial displacement forces the tourbillon cage to the surface - the hands taken out of the way - remain at 12 o'clock for as long as the tourbillon lift button remains pressed. An extremely complex mechanism, this timepiece also offers power reserve of approximately 70 hours. Among the other watch brands, Frank Muller's Tourbillon Revolution series are perhaps the only tourbillon watches to have such a unique feature, a timepiece paying homage as no other to the playful instincts of man.

A year later, he outdid himself once again by presenting to the world his Double Axis Tourbillon, aptly called the Revolution 2. Attached by suspension and sitting in a spherical cage like a ballerina, the double axis tourbillon revolves along two axes, rotates as if on tippy toes, while simultaneously performing a series of somersaults. On either side of the dial opening are two retrograde indicators - one going from 0 to 60, to show the revolving time the tourbillon cage makes along its more traditional axis while also functioning as the seconds hand, and the other indicator graduated from 0 to 8 minutes to show the time the tourbillon cage takes to revolve along its new double "revolutionary" axis. Costs of ownership for one will set you back about US $635,000.00, give or take a few dollars.
After Tourbillon Revolution 2, it was almost an obligation for the company to present Tourbillon Revolution 3. And present it, they did - the new three axis tourbillon rotates on three axes, the cages revolve at varying speeds: the inner cage every 60 seconds, the second cage every 8 minutes, and the large, outer cage once an hour. The complete movement comprises 289 finely crafted components worked individually by hand.

Since the tourbillon's 200th anniversary in 2001, the number of brands incorporating the tourbillon into their own wristwatches has increased exponentially. While in 2001, there may have been fewer than fourteen companies to feature such a highlight in their collections, at last count in 2005 there were more than fifty doing so. Nearly all major brands as of this writing has a tourbillon timepiece in their collection.

Several Reasons Why Tourbillon Watches Are Held High Admiration

Why all the tourbillon admiration? There are several reasons why tourbillon watches are held in such high admiration and esteem today.

First of all, the veneration given the tourbillon is due to the unquestioned and deserved prestige of its inventor Abraham Louis Breguet, rightly called the "watchmaker of kings and the king of watchmakers." In his quest for greater precision, Breguet came up with the idea of a mechanism that would compensate for the deviation in running accuracy that he observed when pocket watches were tested in vertical positions. His concept was a rotating cage that would bear all of the parts of the escapement; in its center, the tourbillon cage would carry the regulating organ (the balance); and the escape-pinion would revolve around the second wheel. See structure of the tourbillon. This rotary movement compensates for the running deviations observed in the vertical positions. This is a decisive advantage for a watch, especially for a pocketwatch worn close to the body that spends most of its working life in a vertical position.

A further reason for the tourbillon admiration is our romance associated with mechanical wristwatches. With the rebirth in popularity of the mechanical watch back in the mid- to late-1980s, the tourbillon watch represented to many, the epitome of that renaissance. Some authorities have even credited Audemars Piguet's Tourbillon 1, an ultrathin bumper automatic lever tourbillon wristwatch developed in 1986 for starting the craze of the mechanical revival. With more than a century having passed since Breguet invented the tourbillon for packet watches, Audemars Piguet was the first company to develop a tourbillon for wristwatches. In fact, from 1860 until 1980 only 650 tourbillons (all of course for pocket watches) were produced worldwide for all brands combined! Since the debut of Audemars Piguet's Tourbillon 1 in 1986, there has been an amazing explosion of tourbillon wristwatches, testament to the romance of the tourbillon regulator.

Another reason for the tourbillon admiration is the technical difficulty involved in their manufacture. Even in its most basic design, it is extremely hard to manufacture and can be carried out only by particularly skilled watchmakers. In watchmaking circles, creating a tourbillon is regarded as the consummation of a craftman's skills. The complexity of its manufacture alone guarantees that only a few watchmakers are capable of this masterful achievement, so it comes as no surprise that, over the past few years, several brands have relied on offering this complication as proof of their technical prowess.

Over the generations of watchmakers since Breguet, there were probably fewer than 250 able to execute such a masterpiece. The tourbillon cage is made under extremely precise mechanical tolerances and it cannot have much weight or friction. At a time when computers did not exist and all tools were still somewhat primitive, the production of a tourbillon watch was a certificate of competence far more appreciated than the diplomas awarded by the best watchmaking schools. International Watch Company's (IWC) "Il Destriero Scafusia" tourbillon model demonstrates the complexity of the mechanism. It is manufactured of approximately 100 parts, and weighs only 0.296 grams.



The tourbillon in the "Destriero" consists of 100 individual parts and weights just 0.296 grams:


1. Upper part of cage in titanium

2. Balance

3. Escapement bridge in titanium

4. Middle section of cage in titanium

5. Pallets

6. Escape wheel

7. Shock resistant supports

8. Lower part of cage in titanium with pinion

9. Fixed fourth wheel
Yet another explanation for the tourbillon admiration is that most tourbillon pocket watches presented in observatories for timing in the 19th century, were manufactured by renowned watchmakers or companies.

Friday, May 28, 2010

Structure of The Tourbillon


Here is a graphical illustration of the tourbillon parts. The tourbillon device has the escape wheel, lever, and balance wheel all mounted in a carriage made of a lightweight material (usually titanium). The carriage turns 360 degrees at regular intervals (usually once per minute). The fourth wheel (not shown) is fixed and is concentric with the carriage pinion and arbor. The escape wheel pinion meshes with the fourth wheel and rotates around the fourth wheel in the fashion of a satellite. The escape wheel and lever are mounted on the carriage, and the third wheel (not shown) drives the carriage pinion, turning the carriage once every minute. This rotation of the escapement helps reduce the positional errors of a watch.

How The Tourbillon Works

Gravity was thought to have a very adverse effect on the accuracy of time pieces at the time of the invention of the tourbillon, particularly because pocketwatches were often less accurate than stationary clocks of the same construction. The prevailing theory amongst horologists of the time was that pocket watches suffered from the effects of gravity since they were usually carried in the same pocketed position for most of the day, which was vertical, and then held in a different position while being read. Because the movements of pocket watches and similar pieces were oriented with respect to the cases and the dials, their movements were positioned with the axes of motion perpendicular to their faces. This meant that when the timepiece was placed vertically, the axis of motion of the movements would be parallel to the ground, and thus to the force of gravity. In such a position, the force of gravity would affect the motion of parts of the movement differently when the parts were in different positions (i.e., moving with gravity or moving against it), which would cause variations in the rate of the movement, which in turn would affect the timepieces' accuracy. If adjusted for one position, the rate would change when the piece was kept in a different position, such as when being held to be read or when placed on a table at night. In a tourbillon, the entire escapement assembly rotates, including the balance wheel, the escape wheel, the hairspring, and the pallet fork, in order to average out the effect of gravity in the different positions. The rate of rotation varies per design but has generally become standardized at one rotation per minute. Most tourbillons use standard swiss lever escapements, but some have a detent escapement, and others contain novel designs, such as the Audemars Piguet Millenary for example.

The tourbillon is considered to be one of the most challenging of watch mechanisms to make (although technically not a complication itself) and is valued for its engineering and design principles. The first production tourbillon mechanism was produced by Breguet for Napoleon in one of his carriage clocks (travel clocks of the time were of considerable weight, typically weighing almost 200 pounds).

The History of Tourbillon Watch

The tourbillon history is an intriguing and thought-provoking one. Along with minute repeaters, grande and petite sonneries, perpetual calendars, and chronographs, the tourbillon is one of the most fascinating complications of mechanical horology. Priced out of the reach of all but a lucky few, the tourbillon is rarely seen up close and personal but most often seen in pictures. Once viewed, however, one cannot help but be seduced by the stately and measured dance of the tourbillon ("whirlwind" in French).



The tourbillon history dates back to the 18th century. The invention of the tourbillon, or tourbillon regulator stem from the days of the pocket watch and came about as a result of men's quest for improved accuracy of marine chronometers, a chronometer being a high precision watch. 18th century sailors on the high seas literally depended their lives on the accuracy of their ship's deck watch or these marine chronometer to steer them on course and out of harm's way. The quest for accuracy was obvious and did not end there - after all this was a time of continual innovation and invention in horology, the start of the tourbillon history being just around the corner. As a chronometer would almost invariably rest in the same position, gravity was a directional constant affecting the behavior of the chronometer's balance wheel and balance spring. In fact, the influence of gravity on the accuracy of mechanical watches had worried watchmakers for centuries. How is this so?

Depending on the position of the watch in the vertical plane (crown left; right; down; or up), different variations in the frequency of the balance wheel will occur as a result of changes in its center of gravity. For when a watch is in the vertical position, the earth's gravity either accelerates or slows the balance and the escapement (mechanism in the watch that regulates the speed of rotation of the wheels), causing a rate gain or loss. Even a watch in excellent condition that has been recently lubricated, serviced, and adjusted for temperature variations will still suffer the inevitable influence of the gravitational force of the Earth.



To nullify the effects of gravity in pocket watches, the great French watchmaker Abraham-Louis Breguet invented the tourbillon in 1795, propelling the tourbillon history.

But his invention became known officially only in 1801 when he applied for a patent. The first pocket watch equipped with a tourbillon mechanism was sold in 1805 but it was presented formally to the public during the Parisian show of French industrial products in 1806.

Remember now that the tourbillon is a holdover from the days of the pocket watch. One chapter in the tourbillon history evidences that the tourbillon regulator made the jump to wristwatches starting in 1930. Unlike a wristwatch, a pocket watch worn in a vest will spend the majority of its time in a vertical position. Therefore, Breguet allegedly decided that, for the absolute best accuracy, some means of balancing out the effects of gravity in the various positions was needed. His ingenious solution placed the balance wheel, escape lever, and escape wheel in a cage, which then rotated a full 360 degrees making a complete revolution around itself, usually in a minute. In this way, the overall effects of gravity get balanced out, as the escapement of the movement never spends any significant time in one vertical position.

To demonstrate the functional principle of the tourbillon, an example is shown below:

Assume a watch with the following daily rates: crown down (-2 seconds); crown up (+2 seconds); crown left (0 seconds); crown right (0 seconds).
This watch, placed in the "crown down" position over a period of 4 days would lose 8 seconds. After another 6 days in the "crown up" position would advance it 12 seconds. It's simple to see that after the 10 day period, the watch will have gained a total of 4 seconds as compared to day 0.

dayPosition of CrownDaily RateDaily Variation
1Down-2-2
2Down-2-4
3Down-2-6
4Down-2-8
5Up+2-6
6Up+2-4
7UP+2-2
8Up+20
9Up+2+2
10Up+2+4

Now, what would happen to the same watch if a tourbillon was installed in it? It is also simple to see that this watch would not suffer any variation, since the crown up and crown down positional errors would continually cancel each other out throughout the day (2 second - 2 second = 0 second). The positions crown left and right did not cause variation in this example).

dayPosition of CrownDaily RateDaily Variation
1Down00
2Down00
3Down00
4Down00
5Up00
6Up00
7UP00
8Up00
9Up00
10Up00

The tourbillon, therefore, tends to compensate for errors that occur as a result of the position of the watch, thereby increasing its accuracy.

One chapter in the tourbillon history that begun with Breguet has been written; but the pursuit for sophistication, horological excellence and high aesthetics is not over yet... Another chapter of the tourbillon history is currently being written by contemporary watchmakers coming up with complicated tourbillon inventions such as the flying tourbillon and the double axis tourbillon outperforming and in some cases outshining the traditional Breguet-type tourbillons.

The year 2001 marked the 200th anniversary of the tourbillon.

Stay tuned for more tourbillon history.