Omega Seamaster Diver 300M Co-Axial Master Chronometer Watch - 42 mm Steel And Yellow Gold Case - Unidirectional Bezel - Blue Ceramic Dial - 210.20.42.20.03.001 Seconds caliber 3126 / 3840 self-winding

caliber 3126 / 3840 self-winding movement with hours

dual bezel with a tachymeter scale on a white ceramic ring while the outside is diamond-paved

black dial set with bi-directional 24-hour GMT rotating bezel

silver dial set with diamonds

Omega Seamaster Diver 300M Co-Axial Master Chronometer Watch - 42 mm Steel And Yellow Gold Case - Unidirectional Bezel - Blue Ceramic Dial - 210.20.42.20.03.001 Seconds caliber 3126 / 3840 self-winding42 mm stainless steel and 18K yellow gold case with helium escape valve, transparent back, unidirectional rotating bezel with a Ceragold diving scale, domed scratch resistant sapphire crystal anti reflective treatment on both sides, polished blue ceramic dial with laser engraved waves and a date window at 6 oclock, Caliber Omega 8800 self winding movement with co axial escapement, chronometer, date, approximately 55 hours of power reserve, stainless