Omega Planet Ocean 600M Co-Axial Master Chronometer Limited Edition of 88 Watch - 39.5 mm White Gold Case - Unidirectional Diamond Bezel - Mother-Of-Pearl Dial - White Leather Strap - 215.58.40.20.05.00139. 5 mm 18K white gold case with helium escape valve, transparent screw in back, screw in crown, unidirectional rotating bezel set with baguette diamonds and gradiant blue sapphires with one orange sapphire at 12 o'clock, domed scratch resistant sapphire crystal with anti reflective treatment on both sides, white mother of pearl dial with Arabic numerals and a date window at the 3 oclock, caliber 8801 self winding Co Axial chronometer movement with