Omega Style No: 131.23.41.21.11.001 Omega Constellation Co-Axial Master Chronometer - 41 mm Steel And Sedna Gold Case - Dial

41 mm steel and sedna gold case, transparent back, polished black ceramic bezel with Roman numerals in OMEGA Ceragold, domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides, sun-brushed dial, Calibre 8900 self-winding chronometer movement with date. Water resistant to 50 metres (167 feet).