Omega Seamaster Railmaster Omega Co-Axial Master Chronometer Watch - 40 mm Steel Case - Vertically Brushed Black Dial - Two-Tone Grey Coated Nylon Fabric Strap - 220.12.40.20.01.001

40 mm stainless steel case, screw-in crown, domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides, vertically brushed black dial with brushded stainless steel hands and recess hour-markers filled with vintage-color Super-LumiNova, caliber 8806 self-winding Co-Axial master chronometer movement, approximately 55 hours of power reserve, two-tone grey coated nylon fabric strap. Water resistant to 150 m (500 ft).