Omega Speedmaster Moonwatch Co-Axial Chronograph Dark Side of the Moon Watch - 44.25 mm Black Ceramic Case - Black Zirconium Oxide Ceramic Dial - Black Coated Nylon Fabric Strap - 311.92.44.51.01.00344. 25 mm black ceramic case, transparent back, black bezel with with matt chromium nitride tachymeter scale, scratch resistant sapphire crystal with anti reflective treatment on both sides, black zirconium oxide ceramic dial, self winding chronometer Omega 9300 movement with Co Axial Escapement, chronograph, date, and small seconds, approximately 60 hours of power reserve, black coated nylon fabric strap with red stitching. Water resistant to 100 m.