Omega Speedmaster Moonwatch Watch, with the Model Number: 310.63.42.50.10.001, has a Moonshine Gold 42 mm Round Case with Screw Down Crown and a Ceramic. 42 mm moonshine gold case, transparent back, green ceramic bezel ring, scratch-resistant sapphire crystal with anti-reflective treatment inside,This Men's Omega Speedmaster Moonwatch has an attractive Green Dial with Index Dial Markers. Calibre 3861 manual-winding chronometer movement with chronograph and small seconds. Water resistant to 50 metres (167 feet).The certified Swiss tested Omega Movement will keep perfect time for you. The elegantly designed Omega Leather with will look great on your wrist.