Omega Speedmaster 38 Co-Axial Chronograph Watch - 38 mm Steel And Sedna Gold Case - Dual Diamond Bezel - Cappuccino Dial - Taupe-Brown Leather Strap - 324.28.38.50.02.00238 mm stainless steel and 18K Sedna gold case, dual bezel with a tachymeter scale on a brown aluminium ring while the outside is diamond paved, scratch resistant sapphire crystal anti reflective treatment on both sides, cappuccino dial includes horizontal brown oval subdials and a vertical oval date window at 6 oclock, tachymeter scale, Caliber Omega 3330 self winding movement with chronograph, chronometer, date, approximately 52 hours of power