The Tri-Axial Tourbillon represents a major success for Girard-Perregaux, with a high-speed tourbillon on three separate axes.
Once again, the Manufacture at La Chaux-de-Fonds demonstrates its mastery of the tourbillon by taking its search for precision even further with the Tri-Axial Tourbillon.
The Tri-Axial Tourbillon by Girard-Perregaux features a regulator on three separate axes and at its heart beats a traditional tourbillon. Its cage performs one rotation in one minute. It is integrated within a structure positioned on a second axis and performs a complete rotation in 30 seconds. Finally, both are inserted into a third system. The ensemble is placed on a third axis and performs one rotation in 2 minutes. The diameter of the ensemble comes to 13.78 mm.
With a total weight of 1.24 grams, the cage and the drive systems are made of steel. The support pillars are in titanium, or in pink gold to act as a counterweight where the kinetic balance required this. As for the balance, it integrates 16 pink gold adjustment micro-screws. It has an increased frequency of 3 Hz, or 21,600 vibrations per hour.
The Tri-Axial Tourbillon caliber remains absolutely faithful to the purest of traditions. The cage adopts the lyre shape that has been characteristic of Girard-Perregaux Tourbillons since the 19th century. They therefore present mirror-polished surfaces and perfect chamfering (especially on a number of inward angles which are particularly difficult to finish). The gear train is circular-grained and the sides are satin-brushed. On the case-back, the eagle, the symbol of the manufacture since 1897, is engraved and a plaque in the arrow shape of the Tourbillon with Three Bridges’ bears the individual number of each piece which are limited to 10. This shape is also found on the emblematic gold bridges also visible on the back of the movement.
Displaying hours, minutes and a time reserve indicator, the new GP09300 mechanical caliber with manual winding measures 36.10 mm in diameter with a height of 16.83 mm. It comprises 317 components and has a minimum power reserve of 52 hours.
Complex sapphire crystal
Crafted from pink gold, the case respects the design codes of Girard-Perregaux’s Haute Horlogerie collection with a beveled bezel, a rounded case-center and lugs that narrow out elegantly towards the exterior. The superior sapphire crystal presents a spectacular construction. At 9 o’clock, a domed sapphire crystal, designed to highlight the tourbillon’s three axes, is applied to the main crystal, which is first pierced to the required diameter. A toric-shaped sapphire crystal is also integrated into the side of the case at 9 o’clock in order to show this fascinating spectacle from another angle. Finally, the case-back, which is screwed and transparent, reveals the entire movement and, in particular, the satiny circular bridge engraved with the words “Tri-Axial” that supports the differential of the tourbillon system.
Girard-Perregaux, Tri-Axial Tourbillon: Technical specifications
Case: pink gold
Diameter: 48.00 mm
Dial: gray anthracite
Crystal: anti-reflective sapphire with dome to cover the tourbillon
Case-back: anti-reflective domed sapphire crystal
Apertures on the side to reveal the movement / anti-reflective toric crystal
Water resistance: 30 meters (3 ATM)
Girard-Perregaux movement GP09300-0001
Mechanical, manual winding movement
Diameter: 36.10 mm (16 ”’)
Thickness: 16.83 mm
Frequency: 21,600 Vib/h – (3 Hz)
Power reserve: min. 52 hours
Number of components: whole movement: 317
Two-arrow Bridges: in pink gold
• Tourbillon cage: 140 components for 1.24 g
• 3 axes
• One rotation every 1 minute on the first axis, every 30 seconds on the second axis, every 2 minutes on the third axis.
• Poised upper and lower cages with pink gold counterpoise
• Beveled and hand-polished pallets bridge
• Balance wheel: variable inertia with pink gold setting screw
All components of the movement have hand finishing according to Haute Horlogerie criteria.
Functions: Tri-Axial tourbillon, hour, minute, power reserve indicator
Black alligator leather strap with hand stitches
Pink gold folding buckle