Audemars Piguet Royal Oak Offshore 26020ST.OO.D101CR.01. "F966xx" Series. AP In-house Automatic Movement, stainless steel case 42mm fitted with a brand new AP rubber strap with the AP stainless steel deployment buckle. Water-resistant up to 100 m, screw-down crown, and Sapphire crystal. Date, hours, seconds, minutes, and chronograph functions. Caliber 2326/2840. Box & Cert Dated Oct 2007.