Omega Speedmaster Moonwatch Co-Axial Chronograph Black Dial Leather Mens Watch 311.33.44.51.01.001. Stainless steel case with a black leather strap. Fixed bezel. Black dial with silver-tone hands and index hour markers. Minute markers around the outer rim. Automatic movement. Caliber: omega 9300 engine. Scratch resistant sapphire crystal. Screw down crown. Skeleton transparent exhibition see through case back. Case diameter: 44.25 mm. Case thickness: 14 mm. Tonneau case shape. Band width: 20 mm. Band length: 7 inches. Push button deployment clasp. Water resistant at 100 meters / 330 feet. Functions: chronograph, date, hour, minute, second, chronometer, tachymeter.