This is an authentic AUDEMARS PIGUET Stainless Steel 29mm Royal Oak Automatic Watch Blue 8638ST. The watch is crafted of stainless steel and features a blue dial, sapphire crystal, brushed steel bracelet, 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.