Omega Style No: 310.60.42.50.99.002 Omega Speedmaster Moonwatch Professional Co-Axial Master Chronometer Chronograph - 42 mm Moonshine Gold Case - 18K Moonshine Gold Step Dial

42 mm moonshine gold case, transparent back, black ceramic bezel ring, scratch-resistant sapphire crystal with anti-reflective treatment inside, sun-brushed 18k moonshine gold step dial with blackened subdials and indexes, Calibre 3861 manual-winding chronometer movement with chronograph and small seconds. Water resistant to 50 metres (167 feet).