BREGUET – CLASSIQUE 7255BH Tourbillon Sidéral Gold Special Edition 2025
Mastering time through the art of the tourbillon
With the Classique Tourbillon Sidéral 7255 wristwatch Breguet unveils the fourth chapter of its 250th anniversary celebrations. The release date, the 26th of June 2025, is in homage to the 26th of June 1801 when Abraham-Louis Breguet obtained a patent for his invention of the iconic tourbillon. This exclusive watch will have a limited production run of only 50 timepieces.
The tourbillon at the heart
of the movement and its history
The Breguet manufacture possesses a unique expertise in tourbillons, inherited since A.-L. Breguet obtained its patent on 7 Messidor Year 9 of the French Republican calendar – i.e., 26 June 1801.
The House has never ceased to explore the infinite variations of this complication, but this is the first time it is presenting a “flying tourbillon” version. This interpretation also features a so called “mysterious” design, a construction that Breguet has mastered for many years.
Click, to see the large size. ▶ BIG FOTO Beyond honoring the master’s complication, this innovation also celebrates the very etymology of the word “tourbillon”. The choice of the term “Sidéral” is no accident: it evokes the world of stars, the precision of celestial movements, and the measurement of time by the heavens. It refers to astronomical time based not on the Sun but on the fixed positions of stars. It suggests a more rigorous, universe-oriented notion of time.
The presence of a tourbillon in a piece recalling Breguet’s astronomical developments also fits a historical context. Indeed, the contemporary meaning of “tourbillon” closely aligns with its etymology: “something rotating rapidly in a circle”. However, in the 17th and 18th centuries, things were different.
Click, to see the large size. ▶ BIG FOTO .jpg)
At that time, mathematician Blaise Pascal broadened the meaning of tourbillon to denote a “material system animated with rotational motion” (
1647, Descartes, Principes Philosophiques). Since then, the notion of tourbillon has been extended to planetary systems, hence its direct link to astronomy.
Breguet is part of the scholarly tradition of his century. However, his invention was significantly ahead of its time, because
224 years later the tourbillon remains the subject of countless developments, without its principle ever truly being surpassed.
Variations on a tourbillon
A.-L. Breguet (1747-1823) imagined the tourbillon towards the end of the 18th century, while being careful not to set out its definitive technical aspects. As a perpetual inventor, driven by an unending desire to advance the science of watchmaking, he was aware that he had forged a principle, not a finite, immutable device.
He himself experimented with numerous forms, altering its design, oscillation frequency, speed of rotation or escapement (lever, detent or natural).
Click, to see the large size. ▶ BIG FOTO 
Breguet, which signed its watches “
Breguet et fils” in the early
1800s, would itself devote more than thirty years to this project. Some forty tourbillons were produced between
1796 and
1829.
Today, by developing its first flying tour-billon, Manufacture
Breguet is continuing in the spirit of the great watchmaker
A.-L. Breguet by returning to the foundations of the tourbillon to offer a doubly different interpretation: flying and mysterious.
The flying tourbillon is a variant of the traditional tourbillon. Its purpose (to compensate for the effects of gravity on the balance wheel by rotating the cage that houses it) is therefore unchanged. However, it is a much later development: its first creations date back to the early 20th century.
Click, to see the large size. ▶ BIG FOTO 
Unlike the traditional tourbillon, the flying tourbillon’s cage is supported only by its lower bridge, without an upper bar. It is thus held solely from below. Elevated above everything, one is captivated by its mesmerizing display.
Its design and construction are more complex, however, since the tourbillon cage is no longer supported by a pivot at the top, only at its base. This means it must be more solidly constructed, better balanced and more finely adjustable than a normal tourbillon. Back in 1801 A.-L. Breguet strove for robustness and precision, more than 200 years later the manufacture that bears his name is still pursuing these objectives.
A mysterious design
Breguet has accentuated the suspended effect of its first flying tourbillon, by adding the mysterious complication.
Click, to see the large size. ▶ BIG FOTO 
The mysterious complication consists of imparting a movement to an organ with-out it being visibly linked to the rest of the movement. It is often used for watch and clock hands, but any rotating organ can be involved, including the tourbillon, as seen on the
Classique Tourbillon Sidéral 7255.
Click, to see the large size. ▶ BIG FOTO
The mysterious tourbillon is a striking com-plication which has been mastered by
Breguet watchmakers. The lower bridge and the lower support of the tourbillon carriage, are, for this model, made of sapphire glass with an anti-reflective coating, rendering them invisible.
Click, to see the large size. ▶ BIG FOTO
The point of contact between the gears and the carriage is not visible; it is offset from the tourbillon cutout and therefore hidden from view by the dial.
Mysterious and flying
The Classique 7255 thus incorporates both a mysterious and a flying tourbillon. This results from the combination of a regulator with an invisible drive that extends above the movement.
Click, to see the large size. ▶ BIG FOTO 
Altogether, it creates a levitation effect and enhances visibility of the mechanism.
A tribute to astronomy
A.-L. Breguet, born in Neuchâtel on 10 January 1747, set up his own business in 1775. He opened his workshop on the Quai de l’Horloge on the Île de la Cité in Paris, his adopted home. In the world-famous French capital, the young Breguet studied at the Collège Mazarin with Abbé Marie, an eminent professor of mathematics. The two men would remain friends for decades, instilling in the future watchmaker a keen interest in astronomical studies.
Click, to see the large size. ▶ BIG FOTO 
The solid scientific background of his studies at the
Collège Mazarin allowed
Breguet to become an engineer ahead of his time. He would later join the Académie des Sciences (which was housed in the
Collège Mazarin), as well as the Bureau des
Longitudes in Paris, dedicated to perfecting various branches of astronomy.
During his lifetime, he worked with the astronomers
Lalande, Biot, Bouvard,
Nicollet and
Cassini, as well as
François Arago, a young astronomer he met at the
Académie, to whom he delivered an eyepiece astronomical counter (a counter that attached to an observation telescope).
Astronomical aesthetics
With the new Classique Tourbillon Sidéral 7255 Breguet has, for the first time in its history, chosen to create a dial with aventurine enamel. A tribute to astronomy and the observation of the starry sky, its deep blue is punctuated with sparkling inclusions, shining like the stars that adorn the celestial vault.
The art of aventurine dates back to the early 17th century and has been constantly perfected ever since. For this model, Breguet chose to work it like grand feu enamel.
Click, to see the large size. ▶ BIG FOTO 
The glass must therefore be reduced to powder. The final compound must be finely calibrated - aventurine powder, for a perfect result, must have slightly larger grains than traditional enamel powder.
At least five layers of aventurine are necessary to make this dial, each layer must be fired in a kiln at over 800 degrees Celsius. And each firing is highly sensitive and requires great precision: firing for too long, or at too high a temperature, can result in the dial being permanently compromised.
Click, to see the large size. ▶ BIG FOTO 
The dial of the Classique Tourbillon Sidéral 7255 combines the best of both worlds: the deep, solid blue of the enamelled glass, and the sparkling randomness of the copper particles that represent the stars.
Given that each aventurine enamel dial is hand-crafted no two will ever be same, as such, all 50 examples of the Classique Tourbillon Sidéral 7255 are essentially unique pieces.
“Invented by Abraham-Louis Breguet in 1801, the tourbillon remains one of the most complex complications in watchmaking. Its mastery embodies the technical excellence to which the House of Breguet has remained faithful for more than two centuries.”
Gregory Kissling, CEO
Technical explanation
of the tourbillon
The Manufacture Breguet has paid particular attention to the tourbillon in the Classique Tourbillon Sidéral 7255 in order to perpetuate the relevance of this precious invention with contemporary aesthetic and technical design codes.
Click, to see the large size. ▶ BIG FOTO 
It is raised to accentuate the depth of the device and the sensation of floating in the void - a metaphor for celestial bodies floating in the immensity of space.
The tourbillon has been raised so that it protrudes 2.2 mm above the plate, and 0.9 mm above the aventurine enamel dial. The whole device has a total height of 7 mm. In other words, it is the tourbillon alone that gives the calibre its overall height and equally determines the thickness of the case (10.2 mm). In the
Classique Tourbillon Sidéral 7255, the tourbillon is king: the entire movement is built around it, and its proportions guide those of the watch as a whole.
Click, to see the large size. ▶ BIG FOTO To achieve this majestic effect, it was necessary to invent a new way of designing and creating the dial. It is comprised of different elements such as a gold base with a raised rim and a gold tourbillon bezel. Such a design means that these elements have a secret technical function: They form raised walls of metal that close off the edges of the dial. These allow the aventurine enamel to be carefully built up throughout the enamelling process.
With the hour-marker, “
Breguet” and “
Tourbillon” appliques and the hour applied elements all gleaming with the warm glow of
Breguet gold, the dial is not only a delight to behold but plays its own part in the “mysterious” complication. Hidden behind it lies the mechanism that drives the tourbillon cage, giving the impression that the cage is floating, with no visible connection to the rest of the movement.
The Tourbillon Sidéral, decoration
The Classique Tourbillon Sidéral 7255 is crafted in Breguet gold. This proprietary alloy was unveiled during the first chapter of the 250th anniversary celebrations. Its warm, subtly pink hue is inspired by the gold used by 18th century watchmakers, including Breguet. It is composed of 75% gold, enriched with silver, copper and palladium. Beyond its brilliance, it is distinguished by its resistance to discolouration and its stability over time.
Click, to see the large size. ▶ BIG FOTO 
For the first time, the recently unveiled
Quai de l’Horloge guilloché is executed not only in a circular pattern on the case back and tourbillon support, but also in a linear fashion across the entire movement main plate.
This guilloche motif’s design is inspired by the delicate curves of the river Seine as it flows around the
Île de la Cité and the
Île Saint-Louis.
On the dial side, each piece is adorned with the brand’s secret signatures, complementing the many other traditional
Breguet design codes such as the finely fluted case middle, the straight lugs and the
Breguet “hollowed apple” hands. On the back, each piece is individually numbered from
1/50 to 50/50. Interview with Gregory Kissling, CEO of Breguet
Why did you want to make a mysterious flying tourbillon?
Breguet already has several tourbillon models in its collections, and we have already presented a timepiece with a mysterious version. What’s new, however, is this flying cage that allows the tourbillon to take centre stage, along with the aventurine dial.
What makes it so special?
It is, quite simply, the very first time in Breguet’s history that a flying tourbillon is being introduced. A beautiful way to celebrate its 224th anniversary! And the tourbillon model we chose to reinterpret is no ordinary one: among the tourbillon movements in Breguet’s archives, it is the one used in the very first Breguet tourbillon wristwatch, unveiled in 1990 under reference 3350.
The Classique Tourbillon Sidéral 7255 thus pays homage to that iconic timepiece and to the master’s invention. I would even go so far as to say that this creation is an ode to the tourbillon itself, where time indication is almost secondary...
Can you tell us about aventurine?
This material has a ‘wow’ effect when you see it. Its name comes from the Italian “a ventura”, which means “by chance”, because of the way it came into being. In the 17th century, a glassmaker in Murano accidentally dropped copper filings into molten glass.
As it cooled, these metallic particles crystallised in suspension in the vitreous mass, giving rise to a sparkling glass that had never been seen before. The radiant blue is obtained by using cobalt crystals.
Why did you choose to incorporate aventurine in this particular model?
Each of our anniversary models tells a story. With this new model, we wanted to tell the story of the tourbillon. The name of our new creation includes the word “Sidéral”, meaning “related to the stars”. And remember what the term “tourbillon” referred to in A.-L. Breguet’s time: celestial bodies rotating on a fixed axis. The connection is obvious! When you gaze at the night sky on a clear evening, you see countless stars.
That’s where the use of aventurine makes perfect sense. The copper particles inside evoke stars sparkling in the sky. Stars—or celestial bodies. It all comes together beautifully.
Interview with Gregory Kissling, CEO of Breguet
Will aventurine be a permanent fixture in the Breguet collections?
Yes, it’s quite possible, although there are other interesting materials to explore. However, aventurine has the hypnotic quality that we were looking for in this model, whose complication refers in particular to the celestial sphere. It’s no coincidence that many Haute Horlogerie brands use aventurine in their collections.
How important is it to incorporate new materials into Breguet’s collections?
Like A.-L. Breguet, we like to explore, test and incorporate new materials into our timepieces. Watchmaking is an infinite playground, and we never stop innovating. We also have material specialists within our company who are always trying to go one step further. These projects are the result of good collaboration between various departments.
Interview with Emmanuel Breguet, Head of Patrimony
How many tourbillons were produced in A.-L. Breguet’s time?
The total number of pieces, as revealed by in-depth research in the archives, particularly in the manufacturing books of the period, comes to 35 watches. However, there are 5 additional pieces that should not be forgotten: a sympathique clock, the famous Sommariva clock (composed of a tourbillon clock and a watch that sits on a turntable), a marine chronometer, a large demonstration model and a travel clock.
These varied works are just proof of Breguet’s great ambitions for his invention. A total of 40 pieces were made, which does not take into account 9 other pieces that were never completed and appear in the books as “written off”, “scrapped” or “lost”... Quite an impressive rate of loss!
Had A.-L. Breguet already started work on tourbillon timepieces before obtaining his patent?
Logically, yes. Three pieces were started before 1801, the inventor being impatient to validate his intuitions and calculations.
In A.-L. Breguet’s time, what was the average time taken to produce a Tourbillon timepiece?
It took more than six years, twice as long as for a “normal” Breguet watch. This says a lot about the delicacy of the operations involved and the difficulty of finding the skilled labour necessary to make them, even in the master’s extensive entourage...
What can be said about the sale of the first Breguet tourbillons?
In 1811, at the end of the ten-year patent period, the company had sold ten tourbillons. Unsurprisingly, the buyers included sovereigns (George III and George IV of England, Ferdinand VII of Spain), Russian aristocrats and eminent personalities from all over Europe.
It has so far been established that a quarter of the total of the forty tourbillon-regulated, period timepieces were definitely used for ‘naval’ purposes, i.e. they were bought by shipowners and captains and used for calculating longitude, a vital aide when navigating at sea. Thomas Brisbane took his watch all the way to Australia, and some pieces spent fifty years sailing the world’s seas.
This use must have delighted Breguet, who was passionate about marine watchmaking and wanted to provide ever more precise timepieces in all circumstances.
What became of the very first tourbillons created by the company?
A dozen pieces are kept in museums: three have joined the collections of the Breguet Museum, four are kept in the British Museum or in other institutions in England; others can be seen in museums in Italy (Milan), Israel (Jerusalem) or the United States (New York). Some fifteen others are in the hands of private collectors.
----------------------------------------
TECHNICAL SPECIFICATIONS
Collection CLASSIQUE
Model:
CLASSIQUE Tourbillon Sideral 7255 Edition Click, to see the large size. ▶ BIG FOTO 
Reference: 7255BH/2Y/9VU
Key points
Classique Tourbillon Sidéral 7255, hand-wound Calibre 187M1, 2.5 Hz and 50-hour power reserve, Quai de l’Horloge guilloché on the caseback, 38 mm-diameter case, fluted middle, aventurine enamel grand feu dial, Breguet Arabic numerals, Breguet 18K gold hollowed-head hour and minute hands, Breguet gold “Breguet” and “Tourbillon” applied elements, alligator strap and 18K Breguet gold folding clasp, limited edition of 50 units.
Case
18K Breguet gold
38 mm diameter
10.2 mm thick
Fluted caseband
Quai de l’Horloge handmade guilloché case back
Double anti-reflective sapphire spherical glass
Sapphire back glass engraved “BREGUET 250 YEARS”, double anti-reflective
Welded lugs 3 bar (30 m) water-resistance
Dial
Grand feu aventurine enamel
Off-centred at 12 o’clock
Breguet gold hour-circle, satin-brushed, blue PVD
Breguet Arabic numerals
Breguet hour and minute hands with hollowed head in 18K Breguet gold “Breguet” and “Tourbillon” applied elements in 18K Breguet gold
Indications
Off-centred hours and minutes, small seconds on tourbillon cage
Movement
1 minute tourbillon
Click, to see the large size. ▶ BIG FOTO 
Calibre 187M1 numbered and signed Breguet,
13½ lines, 30 mm in diameter, 183 components, 23 jewels
4.8 mm movement (+ 2.2 mm tourbillon projection)
Manual winding
Frequency 2.5 Hz (18,000 vibrations per hour)
Patented Breguet NivachronTM balance-spring, blue
50-hour power reserve
Bridges in 18K Breguet gold
Quai de l’Horloge guilloché and côtes de Genève finishing
Strap
Navy blue alligator leather, large scales, lined with navy blue alligator leather, small scales, 18K Breguet gold 3-blade folding clasp
🔰 Limited edition 50 pieces, numbered and engraved from 1/50 to 50/50 on the back bezel
Gold Weight 84 g (estimation)
Click, to see the large size. ▶ BIG FOTO 
BOX
Special Edition 250th presentation case in red leather, individually numbered, inspired by
Breguet’s Moroccan leather cases of the period.
Warranty 5-Year International Sales Warranty
Available in Breguet Boutique around the world
🔰 Limited Edition ✅ 50 pieces
🔴 Price: Upon Request CHF 190,000 💰
#Breguet
#BreguetTradition
#MetiersdArts #CLASSIQUE
#Breguet7255BH #Ref7255BH
#myBreguet #Souscription
#myBreguetmoment
-------------------------------
Press release - 2025
-------------------------------
-------------------------------------------------
www.facebook.com - Montres Breguet
------------------------------------------------------------
www.Breguet.com
.jpg)
.jpg)
.jpg)
.jpg)
.jpg)
.jpg)
.jpg)
.jpg)
.jpg)
.jpg)
.jpg)
.jpg)
.jpg)
.jpg)
.jpg)
.jpg)
.jpg)
