Omega Speedmaster Moonwatch Chronograph Black Dial Black Nylon Mens Watch 31192445101005 Black ceramic case with a black nylon strap and Deployment clasp. Fixed black ceramic bezel showing tachymeter markings, Transparent case back. Case diameter: 44.25 mm. Case thickness: 16.3 mm Black dial with luminous black hands and index hour markers. Minute markers around the outer rim Luminescent hands and markers. Date display at the 6 o'clock position Chronograph function features a sweep second hand and a 60 seconds counter and 12 hours counter Swiss Automatic movement. Caliber 9300 engine. Scratch resistant sapphire crystal. Screw down crown, Water resistant at 50 meters / 165 feet