Stainless steel case with a stainless steel bracelet. Fixed stainless steel bezel with black PVD top ring showing tachymeter markings. Black dial with silver-tone hands and index hour markers. Minute markers around the outer rim. Dial Type: Analog. Luminescent hands and markers. Chronograph - three sub-dials displaying: 60 second, 30 minute and 12 hour. Hand wind movement with a 48 hour power reserve. Scratch resistant hesalite crystal. Pull / push crown. Solid case back. Case diameter: 42 mm. Case thickness: 14.3 mm. Round case shape. Band width: 24.1 mm. Band length: 9.5 inches. Deployment clasp. Water resistant at 50 meters / 165 feet. Functions: chronograph, tachymeter, hour, minute, second. Dress watch style. Watch label: Swiss Made. Item Variations: 311 30 42 30 01 005, 311-30-42-30-01-005, 311/30/42/30/01/005, 31130423001005. Omega Speedmaster Professional Moonwatch Black Dial Stainless Steel Mens Watch 318.104.22.168.01.005.