Audemars Piguet Royal Oak Offshore Chronograph (25721BAOO1000BA03) self – winding automatic watch, features a 42mm 18k yellow gold case surrounding a silver Grande Tapiserrie dial on an 18k yellow gold bracelet with folding buckle. Functions include hours, minutes, small seconds, date and chronograph. This watch has been serviced comes with the Service seal and the original box and warranty. F Serial. We back this watch with a 2-Year WatchBox warranty!