Omega Seamaster Diver 300M Co-Axial Master Chronometer Watch - 42 mm Steel And Yellow Gold Case - Unidirectional Bezel - Black Ceramic Dial - 210.20.42.20.01.002

42 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 black ceramic dial with laser-engraved waves and a date window at 6 o’clock, Caliber Omega 8800 self winding movement with co-axial escapement, chronometer, date, approximately 55 hours of power reserve, stainless steel and yellow gold bracelet. Water resistant to 30 bar (300 metres / 1000 feet).