Omega Style No: 215.30.44.22.01.001 Omega Seamaster Planet Ocean 600 M Co-Axial Master Chronometer GMT Watch - 43.5 mm Steel Case - Bi-Directional Bezel - Black Ceramic Dial

43.5 mm stainless steel case with helium escape valve, transparent back, screw-in crown, bi-directional rotating bezel with polished bi-ceramic black and white insert, domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides, black ceramic dial with Arabic numerals, caliber 8906 Self-winding chronometer movement with Co-Axial escapement and GMT time zone function, approximately 60 hours of power reserve, stainless steel bracelet, extendable foldover buckle. Water resistant to 600 m (2000 ft).