This watch is also known as:
25820ST.0.0944ST.04 , 25820ST-OO-0944ST-04 , 25820STOO0944ST04 .
This Audemars Piguet Royal Oak Selfwinding Perpetual Calendar in stainless steel features a 39mm case, dark blue checkered dial, and a steel bracelet. The Audemars Piguet Royal Oak Selfwinding Perpetual Calendar also features an automatic movement with perpetual calendar indicating day, date, month, moon phase and leap years. This watch is water resistant to 20 meters.