This is an authentic OMEGA Stainless Steel 40mm Railmaster Co-Axial Chronometer Automatic Watch Black. This impressive watch is crafted of stainless steel and features a black dial, luminous hour markers and sword hands, an anti magnetic chronometer, and a screw in crown. Features also include a sapphire crystal and self-winding movement with a Co-Axial escapement. Follow this item for alerts. Omega is a registered trademark of Omega. FASHIONPHILE is not affiliated with Omega.