On the rear side, ArtyA has developed a unique date function: an extra-large Calendar with a centrally positioned hand. This is a first for ArtyA – and probably for watchmaking as a whole. Like a conspiratorial wink, reserved for the owner of this unique timepiece alone, the extra-large Calendar is a genuine complication developed especially for the Tourbillon Monopusher Chronograph.
Technical Specifications: MOVEMENT: Oval-shaped manual winding mechanical movement NUMBER OF PARTS: Full movement: 304 Tourbillon cage: 63 NUMBER OF JEWELS: 33 / Olive hole jewels, flat jewels POWER RESERVE: 110 hours With chronograph engaged: 75 hours CHRONOGRAPH: Tourbillon cage toothed rim drives the seconds counter Column wheel TOURBILLON: Swiss anchor escapement Cage rotates once a minute Cage weight: 0.45g BALANCE WHEEL: Balance wheel balanced by gold screws Diameter: 9.60 mm FREQUENCY: 21,600 vibrations per hour INDICATIONS: Hours, minutes Power reserve: Timed minutes and seconds Giant date on rear CASE: Steel or engraved in 5N gold, with side inserts Non-reflective, transparent sapphire crystal glass and back CASE DIMENSIONS: Diameter: 44mm Thickness: 16mm WATER RESISTANCE: 3 ATM
