Audemars Piguet Royal Oak Perpetual Calendar (26574OROO1220OR02) self – winding automatic watch, features a 41mm 18k rose gold case surrounding a blue Grande Tapiserrie dial on an 18k rose gold bracelet with folding buckle. Functions include hours, minutes, seconds, day, date, month, perpetual calendar and moon phase. This watch comes with the original box and Certificate of Authenticity. We back this watch with a 2-Year WatchBox warranty!