Stainless steel case with a black alligator leather strap. Fixed silver-tone stainless steel with a black ion-plated with tachymeter bezel. Black dial with luminous silver-tone hands and index hour markers. Minute markers around the outer rim. Dial Type: Analog. Luminescent hands and markers. Chronograph – sub-dials displaying: three – 60 second, 30 minute and 12 hour. Omega Calibre 1861 hand wind movement with a 48-hour power reserve. Scratch resistant hesalite crystal. Pull / push crown. Solid case back. Round case shape, case size: 42 mm, case thickness: 14 mm. Band width: 20 mm, band length: 9 inches. Deployment clasp. Water resistant at 50 meters / 165 feet. Functions: chronograph, hour, minute, second, tachymeter. Additional Info: comes with a moonwatch presentation box which contains a “nato” strap, velcro strap, a tool to change the bracelet and a book on the speedmaster. Dress watch style. Watch label: Swiss Made. Item Variations: 311 33 42 30 01 001, 311-33-42-30-01-001, 311/33/42/30/01/001, 31133423001001. Omega Speedmaster Chronograph Mens Watch 3188.8.131.52.01.001.