Omega Style No: 131.53.29.20.53.001 Omega Constellation Co-Axial Master Chronometer - 29 mm Yellow Gold Case - Blue Glass Diamond Dial

29 mm yellow gold case, transparent back, bezel with engraved Roman numerals, domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides, blue aventurine glass dial with diamond hour markers with date at 6 oclock, Calibre 8701 self-winding chronometer movement with date. Water resistant to 50 metres (167 feet).