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 IW504602 Experience the convenience of the

Experience the convenience of the calendar aperture

light-blue oval subdials and a vertical oval date window at 6 o’clock

dark brown semi-matte alligator skin strap

coloured sapphires

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 IW504602 Experience the convenience of the40 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).