Omega Style No: 304.30.44.52.01.001 Omega Speedmaster Moonphase Master Chronometer Chronograph Watch - 44.25 mm Steel Case - Black Liquid Metal Bezel - Black Dial

44.25 mm stainless steel case with anti-magnetic properties, transparent back, screw-in crown, black liquid metal bezel with tachymeter scale, scratch-resistant sapphire crystal with anti-reflective treatment on both sides, black sun-brushed dial, caliber 9904 self-winding Co-Axial master chronometer movement with chronograph and moonphase indication, approximately 60 hours of power reserve, stainless steel bracelet. Water resistant to 100 m (330 ft).