This is an authentic OMEGA Stainless Steel 18K Yellow Gold 41mm Speedmaster 57 Co-Axial Chronometer Automatic Watch Silver 331.20.42.51.02.001. This watch is crafted of stainless steel and 18 karat yellow gold, and features a chronograph timekeeping with two sub dials, luminous silver hands and hour markers, a date window, and an automatic movement. Follow this item for alerts. Omega is a registered trademark of Omega. FASHIONPHILE is not affiliated with Omega.