Omega Planet Ocean 600M Co-Axial Master Chronometer Watch - 39.5 mm Steel Case - Unidirectional Diamond Bezel - Black Dial - Black Leather Strap - 215.18.40.20.01.001

39.5 mm stainless steel case with helium escape valve, transparent screw-in back, screw-in crown, unidirectional rotating bezel set with diamonds, domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides, black dial with Arabic numerals and a date window at the 3 o’clock, caliber 8800 self-winding Co-Axial chronometer movement with date function, approximately 55 hours of power reserve, black leather strap with rubber lining. Water resistant to 600 m (2000 ft).