The Audemars Piguet Royal Oak Selfwinding Gray 15400ST.OO.1220ST.04 Replica is a high quality watch. It features a 904L stainless steel case and bezel, with a steel color and sapphire crystal. The movement is an automatic AP 3120 caliber with a power reserve of 60 hours and a precision of (-3/+3 sec/day) within COSC certification limits. The dial is a grande tapisserie grey with stick/dot indices and royal oak hour-marker hands.