Omega Speedmaster Moonphase Master Chronometer Chronograph Watch - 44.25 mm Yellow Gold Case - Silvery Diamond Dial - Black Leather Strap - 304.63.44.52.02.001

44.25 mm 18K yellow gold case with anti-magnetic properties, transparent back, 18K yellow gold bezel with black ceramic ring and Ceragold tachymeter scale, scratch-resistant sapphire crystal with anti-reflective treatment on both sides, opaline silvery dial with diamond polished 18K yellow 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).