OMEGA Speedmaster Moonwatch Professional

The Omega Speedmaster Moonwatch Professional, reference 311.30.42.30.01.005, is a chronograph with a 42 mm steel case. The case is 13.8 mm thick. Lug to lug, the Speedmaster measures 48.2 mm. A Hesalite crystal covers the black dial. Calibre 1861 is a manual-winding movement with a rhodium-plated finish and a 48 hour power reserve. The dial has a small seconds sub-dial, a 30-minute recorder and a 12-hour recorder, and the watch also has a tachymeter. A steel bracelet is fitted to the watch. Omega rates the case to 50 metres, or 5 bar.