Omega Style No: 131.63.41.21.01.001 Omega Constellation Co-Axial Master Chronometer - 41 mm Yellow Gold Case - Black Dial

41 mm yellow gold case, transparent back, polished black ceramic bezel with Roman numerals in Ceragold, domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides, sun-brushed black dial with date at 6 oclock, Calibre 8901 self-winding chronometer movement with date. Water resistant to 50 metres (167 feet).