Omega Style No: 131.23.29.20.99.003 Omega Constellation Co-Axial Master Chronometer - 29 mm Steel And Sedna Gold Case - Blue Dial

29 mm steel and 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 8700 self-winding chronometer movement with date. Water resistant to 50 metres (167 feet).