OMEGA 310.30.42.50.01.004 New Speedmaster Moonwatch Professional 42 mm, steel on steelProduct Overview The "Speedmaster Moonwatch" is one of the most iconic models in the world. It is a legendary chronograph that has been carried on all six lunar landing missions and symbolizes Omega's adventurous pioneering spirit. This 42mm timepiece comes with a polished and brushed stainless steel bracelet and features sapphire crystal glass on both the front and case back. It draws inspiration from the design of the fourth generation "Speedmaster"