Omega Style No: 304.63.44.52.01.001 Omega Speedmaster Moonphase Master Chronometer Chronograph Watch - 44.25 mm Sedna Gold Case - Black Diamond Dial - Black Leather Strap

44.25 mm 18K Sedna gold case with anti-magnetic properties, transparent back, 18K Sedna gold bezel with black ceramic ring and Ceragold tachymeter scale, scratch-resistant sapphire crystal with anti-reflective treatment on both sides, black sun-brushed dial with diamond polished 18K Sedna gold indexes and hands, caliber 9905 self-winding Co-Axial master chronometer movement with chronograph and moonphase indication, approximately 60 hours of power reserve, black leather strap, polished-brushed foldover buckle. Water resistant to 100 m (330 ft).