Audemars Piguet Selfwinding Perpetual Calendar

The Audemars Piguet Royal Oak Selfwinding Perpetual Calendar 26684ST.OO.1356ST.01 has a 38 mm steel case, 9.4 mm thick. A sapphire crystal covers the blue dial, which gives clear reading of the perpetual calendar functions. Inside is the self-winding Calibre 7136, a movement adjusted solely through the crown rather than with correction tools. The perpetual calendar tracks date, weekday and month, and it also accounts for leap years. A moon phase display sits on the dial as well. The steel bracelet is integrated to the case and closes with an AP folding clasp. Rated to 50 metres, the case handles everyday wear without concern.