Omega Speedmaster Professional Moonwatch 3570.50.00 42mm Stainless Steel Watch The Omega Speedmaster is an intricate timepiece which was launched by Omega back in 1957, being a perfect addition to any watch collection. This pre-owned example is finished with a black dial inside a 42mm stainless steel case, which is fitted on a 19.5cm stainless steel bracelet. The watch is also powered by a Manual movement and is water resistant up to 30 metres.