Omega Style No: 310.30.42.50.01.002 Omega Moonwatch Professional Co-Axial Master Chronometer Chronograph Watch - 42 mm Steel Case - Black Dial

42 mm steel case, sapphire crystal back, anodised aluminium bezel ring, domed scratch-resistant sapphire crystal with anti-reflective treatment inside, black step dial, Calibre Omega 3861 manual-winding chronometer movement with chronograph and small seconds, approximately 50 hours of power reserve, steel bracelet. Water resistant to 50 metres (167 feet).