Omega Speedmaster Moonwatch 3575.20.00 moon phase Men's Watch. Stainless steel 42mm case with a steel tachymeter bezel. White dial with blue steel Braud arrow luminous hands and blue steel hour indexes. Triple register chronograph display. Sub-dial with moon phase and date display at the 12 o'clock position. Stainless Steel Bracelet with Fold Over Clasp. Will fit up to a 7-inch wrist. Sapphire Crystal, Stainless steel case back.  Calibre 1861 mechanical hand-winding chronometer movement with a 48-hour power reserve. This watch is backed by our two year warranty.