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 provides a crystal-clear view into

provides a crystal-clear view into the heart of Swiss horology

15 mm x 26

4 mm make it a distinctive accessory

5 mm marvel is a celebration of precision and style

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 provides a crystal-clear view into40 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).