Omega Speedmaster Moonphase Master Chronometer Chronograph Watch - 44.25 mm Steel Case - Black Liquid Metal Bezel - Black Dial - Black Leather Strap - 304.33.44.52.01.00144. 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, black leather strap. Water resistant to 100 m (330 ft).