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.
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.
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. 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 mesmerising display.
Breguet has accentuated the suspended effect of its first flying tourbillon, by adding the mysterious complication. 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.
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. For this model, Breguet chose to work it like grand feu enamel. 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.
“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, Montres Breguet
The Classique Tourbillon Sidéral 7255 is crafted in Breguet gold. This proprietary alloy was unveiled during the first chapter of the 250th anniversary celebrations. 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. 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.
Technical Specifications:
Classique Tourbillon Sidéral
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
Calibre 187M1 numbered and signed Breguet, 13ó 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)
Warranty
5-year international sales warranty
Box
Special 250th Anniversary Edition in red leather, individually numbered, inspired by the red Breguet Moroccan leather cases of the period
Price (RRP)
£192,600.00
For more information please visit Breguet