Box & Cert Dated Dec 2015. Audemars Piguet Royal Oak Offshore Chronographs 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, New unworn AP Alligator leather strap , Sapphire casebacks through which display the movement, AP Caliber 3126/3840 with a 55-hour power reserve.