Audemars Piguet Selfwinding Perpetual Calendar

The Audemars Piguet Royal Oak Selfwinding Perpetual Calendar 26685XT.OO.1320XT.01 has an octagonal 41mm titanium case with an integrated titanium bracelet, measuring 9.9mm thick. Its openworked dial reveals the perpetual calendar and moonphase mechanism, protected by a glareproofed sapphire crystal. The calibre 7139 selfwinding movement provides 55 hours of power reserve and drives the hours, minutes, perpetual calendar, and moon phase functions. Water resistance is rated to 20 meters.