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 Concept white mother-of-pearl dial with a

white mother-of-pearl dial with a wavy pattern extending from the iconic claws and 12 diamond indexes

white gold applied hour-markers and royal oak hands with luminescent coating

unidirectional rotating bezel along with gradient blue sapphires over the first 15 minutes and an orange sapphire set at 12 o'clock

pink mother-of-pearl dial with a wavy pattern that flows between the iconic claws and 12 diamond indexes

silver dial set with 12 diamonds

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 Concept white mother-of-pearl dial with a40 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).