MODEL: 26470ST S/NO: I583xx BOX & CERT DATED MAY 2015. Audemars Piguet Royal Oak Offshore Chronograph maintains the case diameter of 42 mm, stainless steel case and bezel, chronograph push-button - black ceramic, The dial’s Arabic numeral hour markers have a more sculpted look, “Mega Tapisserie” pattern on the dial, original AP Unworn Alligator leather strap, Sapphire case back which display the movement, AP Caliber 3126/3840 with a 55-hour power reserve. Unworn condition.