The new Traditionnelle tourbillon watch appearing in a 41 mm-diameter platinum case features a majestic sunburst green dial. This original colour obtained by galvanic treatment endows the model with depth and intensity, enlivening the gleaming whiteness of the noble metal with brightly shimmering reflections. The contrast is further enhanced by the white gold baton-type hour-markers and Dauphine-style hands, while the deep green strap picks up the dial colour.
A traditional calibre
The intrinsic elegance of this new Traditionnelle tourbillon also stems from the slenderness of the case, itself enabled by ultra-thin self-winding in-house Calibre 2160/1 measuring only 5.65 mm thick. This thinness is the result of perfect technical mastery, especially since this calibre incorporates a tourbillon regulator mechanism designed to compensate for the effects of gravity on the isochronism of the balance spring.
To clearly understand how it operates, this regulator has been set to a frequency of 18,000 vibrations per hour (2.5 Hz). This relatively slow tempo often found in historical pocket watches provides an opportunity to appreciate at leisure the tourbillon’s mechanical ballet. The show that can be admired through the sapphire crystal caseback is enhanced by the movement’s structure incorporating a peripheral rotor. The latter reduces the thickness of the calibre as well as ensuring a comfortable 80-hour power reserve.
The movement finishing reflects the same quest for perfection, with a circular-grained baseplate appearing on the dial side and hand-bevelled bridges adorned with Côtes de Genève on the caseback. The tourbillon, with its Maltese cross-shaped carriage bearing the small seconds indicated by a blackened screw, demonstrates the same attention to detail. Its suspension bar has been delicately polished in an entirely hand-crafted operation consisting of filing and then polishing the material to obtain a conical and semi-cylindrical shape.
