Grand Tourbillon perpetual calibre: automatic calibre A1768, 46 mm, 68-hour power reserve. Tourbillon at 6 o’clock, perpetual calendar taking account of months of 28, 30 and 31 days, as well as a 29-day month of February every fours hours years, equation of time and on the backside, the moon-phases and leap-years.Rose gold with large scale guenine crocodile strap.

Grand Tourbillon Perpetual white gold silver dial
Ref. 1GTBW.S03A.C20BD

Days and months displayed through apertures located at 9 and 3 o’clock respectively; the date by a retrograde pointer-type display sweeping over the upper part of the dial; the equation of time displayed through an opening above the hour and minute hand axis. On the back side, the leap years, by a pointer-type display positioned at the top of the movement: four-year cycle symbolised by the markings 1, 2, 3 and B (for bissextile or leap year), and a high precision moon-phase display.