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 platinum 27 mm polished stainless steel

27 mm polished stainless steel and 18K yellow gold case

43 mm thick

18K yellow gold crown and push pieces

brown inner bezel

structured blue rubber strap

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 platinum 27 mm polished stainless steel39. 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 oclock, caliber 8800 self winding Co Axial chronometer movement with date function, approximately 55 hours of power reserve, black leather strap with rubber