Audemars Piguet · Automatic

AP 2240

Basic thickness : 4.00 mm Total diameter : 21.30 mm Frequency : 28,800 vibrations/hour (4 Hz) Number of jewels : 28 Minimal power reserve : approx. 40 hours Unidirectional automatic winding (clockwise – the dial side) Oscillating weight mounted on an unlubricated ceramic ball bearing, with one segment of the weight made of 21-carat gold Balance with variable inertia blocks Flat balance-spring Mobile stud-holder