OMEGA Speedmaster Moonwatch Professional

Omega's Speedmaster Moonwatch Professional 310.32.42.50.01.002 is a chronograph with a 42 mm steel case. Thickness runs to 13.18 mm and lug-to-lug measures 47.5 mm. The manual-winding calibre 3861 has a Co-Axial escapement, a free-sprung balance with silicon balance spring, and a 50-hour power reserve, and it carries Master Chronometer certification with resistance to magnetic fields up to 15,000 gauss. A domed sapphire crystal with antireflective treatment inside covers the black dial, which carries a tachymeter scale and a small seconds display. The steel caseback is transparent, showing the movement. A black calf leather strap closes with a steel foldover clasp. Water resistance holds to 50 metres.