This is an authentic AUDEMARS PIGUET Stainless Steel 41mm Royal Oak Chronograph 50th Anniversary Automatic Watch Silver 26240ST.OO.1320ST.03. This watch is crafted of stainless steel and features a silver "Grande Tapisserie" pattern dial, chronograph complication, date indicator, sapphire crystal, and an automatic movement. Follow this item for alerts. Audemars Piguet is a registered trademark of Audemars Piguet. FASHIONPHILE is not affiliated with Audemars Piguet.