Omega Style No: 131.23.41.21.10.001 Omega Constellation Co-Axial Master Chronometer - 41 mm Steel And Yellow Gold Case - Green Dial

41 mm steel and yellow gold case, transparent back, black polished ceramic bezel ring with Roman numerals filled with OMEGA Ceragold, domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides, sun-brushed green dial with gradient effect with date at 6 oclock, Calibre 8900 self-winding chronometer movement with date. Water resistant to 50 metres (167 feet).