Stainless steel case with a stainless steel bracelet. Fixed stainless steel bezel with tachymeter bezel. Silver dial with luminous silver-tone hands and index hour markers. Date scale around the outer rim. Month and day of the week displayed near the 12 o'clock position. Chronograph - three sub-dials displaying: 30 seconds, 12 hours and 24 hours. Self winding automatic movement. Scratch resistant sapphire crystal. Solid case back. Case diameter: 40 mm. Case thickness: 15 mm. Deployment clasp. Water resistant at 100 meters / 330 feet. Omega Speedmaster Day Date Men's Watch 3221.30.