Model: 26400AU.00.A002CZ.01 Box & Cert Dated July 2015. Audemars Piguet Royal Oak Offshore - Carbon case 44mm, AP Caliber Movement/Caliber 3126/3840, Waterproof 100 m, Sapphire Glass, Dial Black, Original AP Black Rubber Strap fitted with AP buckle. Retail Price $51700.