OMEGA Speedmaster Moonwatch Professional

The Omega Speedmaster Moonwatch Professional, reference 310.32.42.50.04.002, is a chronograph in a 42 mm steel case. The case measures 13.18 mm thick with a lug-to-lug of 47.5 mm. A domed sapphire crystal with antireflective treatment inside covers the white dial. Inside is the manual-winding calibre 3861, a Co-Axial Master Chronometer movement resistant to magnetic fields up to 15,000 gauss, with a power reserve of 50 hours. The tachymeter scale supports the chronograph function, and small seconds sit alongside it. A transparent caseback shows the movement. The watch comes on a black non-grained calf leather strap with a steel foldover clasp. Water resistance is limited to 50 metres, so it is not meant for diving.