Details Men's Omega Speedmaster Reduced 3510.50.00 Stainless Steel 39mm case. Stainless steel bezel with black tachymeter bezel insert. Triple register black dial with patina hour markers. Stainless steel bracelet with fold over clasp. will fit a 7-inch wrist. Calibre 3220 Automatic self-winding movement with a 40-hour power reserve. Acrylic glass. This watch is backed by our one year warranty.