News 
Breguet has unveiled the fourth chapter celebrating its 250th anniversary, the Classique Tourbillon Sidéral 7255. This 50-piece limited edition was unveiled on 26 June in tribute to that same date in 1801, when Abraham-Louis Breguet was awarded a patent for his invention of the tourbillon.
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 craft it like grand feu enamel.
The glass must therefore be reduced to powder calibrated, as aventurine powder must have slightly larger grains than traditional enamel powder in order to achieve a perfect result. The dial involves applying five different layers of aventurine, each fired in a kiln at over 800 degrees Celsius. These highly sensitive procedures require great accuracy, as firing for too long or at excessive temperatures could permanently compromise the dial.
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. 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.
The Manufacture has paid particular attention to the tourbillon in the Classique Tourbillon Sidéral 7255 in order to perpetuate the relevance of this precious invention by incorporating contemporary aesthetic and technical design codes.
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 2.2mm above the baseplate and 0.9mm above the aventurine enamel dial.
The dial features several elements: an aventurine glass-enamelled gold base, a blue PVD-treated gold tourbillon ring, a Breguet hours track as well as “Breguet” and “Tourbillon” appliques.
The overall layout magnificently highlights the tourbillon in a direct reference to the astronomical definition of the technical term dating from Breguet’s era. The specificity of such a construction is that these elements have a secret technical function. They conceal the “mysterious” part that interacts with the rest of the movement.
The Classique Tourbillon Sidéral 7255 is crafted in Breguet gold. This proprietary alloy was unveiled during the first chapter of the Maison’s 250th anniversary celebrations. On the dial side, each piece is adorned with the brand’s secret signatures, complementing the many other traditional watchmaking house design codes such as the finely fluted case middle, the straight lugs and the Breguet open-tipped hands. On the back, each timepiece is individually numbered from 1/50 to 50/50.
September 04, 2025