Stainless steel case with a stainless steel bracelet. Fixed black PVD bezel with tachymeter. Black dial with luminous hands and stick hour markers. Minute markers around the outer rim. Luminescent hands and markers. Chronograph - three sub-dials displaying: 60 seconds, 30 minutes and 12 hours. Self winding automatic movement. Scratch resistant sapphire crystal. Push in crown. Screw in case back. 40-hour power reserve. Case diameter: 39 mm. Case thickness: 12 mm. Deployment clasp. Water resistant at 100 meters / 330 feet. Functions: hours, minutes, seconds, chronograph. Omega Speedmaster Reduced Black Chronograph Men's Watch 3539.50.