Omega Style No: 131.53.29.20.99.001 Omega Constellation Co-Axial Master Chronometer - 29 mm Sedna Gold Case - Blue Dial

29 mm sedna gold case, transparent back, bezel engraved with Roman numerals, domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides, blue dial made from natural blue Aventurine stone, Calibre 8701 self-winding chronometer movement with date. Water resistant to 50 metres (167 feet).