Year: 2022 This is an authentic AUDEMARS PIGUET Stainless Steel Diamond 37mm Royal Oak Offshore 50th Anniversary Automatic Watch Blue 15551ST.ZZ.1356ST.02. This Audemars Piguet Royal Oak Offshore is crafted from stainless steel and features a diamond bezel, a blue Tapisserie dial and an automatic movement fitted with the new Calibre 5900 featuring the 50-Years oscillating weight. Follow this item for alerts. Audemars Piguet is a registered trademark of Audemars Piguet. FASHIONPHILE is not affiliated with Audemars Piguet.