18K Yellow GoldAudemars Piguet Royal Oak Selfwinding Chronograph 42MM Blue Dial 26331BA Condition –Pre-OwnedModel– Audemars Piguet Royal Oak Selfwinding ChronographReference Number – 26331BA.OO.1220BA.01Movement– AutomaticBezel –18K Yellow GoldDial–Blue DialCase Size– 42mmCrystal – Scratch-resistant Sapphire CrystalBracelet–18K Yellow Gold BraceletWater Resistant – 50mGender– Mens