Omega Speedmaster Day-Date 40mm Chronograph Steel Watch 3220.50.00. Automatic self-winding movement. Stainless steel round case 40.0 mm in diameter. Fixed black stainless steel bezel with tachimeter function. Anti-reflective scratch resistant sapphire crystal. Black dial with indexes and subdials. Luminiscent hands and hour markers. Small Seconds hand & 24 hour indicator at 9, Day of week & Month in sub-dial at 12, Date indicated on outer diameter of dial. Brushed and polished stainless steel bracelet with deployent clasp. Fits 7 3/4" wrist.