Omega Seamaster Railmaster Omega Co-Axial Master Chronometer Watch - 40 mm Steel Case - Vertically Brushed Black Dial - 220.10.40.20.01.001 Domed grey nickel-toned dial with Grande

grey nickel-toned dial with Grande Tapisserie” pattern

astronomical moon

unidirectional rotating bezel with a Ceragold™ diving scale

gold detailing at the hour markers and hands

stainless steel and red gold bracelet

Omega Seamaster Railmaster Omega Co-Axial Master Chronometer Watch - 40 mm Steel Case - Vertically Brushed Black Dial - 220.10.40.20.01.001 Domed grey nickel-toned dial with Grande40 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, stainless steel bracelet. Water resistant to 150 m (500 ft).