OMEGA Speedmaster Moonwatch Professional

The Omega Speedmaster Moonwatch Professional ref. 310.32.42.50.04.001 is a chronograph with a 42 mm steel case. Thickness comes in at 13.18 mm and lug to lug measures 47.5 mm. The white dial sits under a domed sapphire crystal treated with antireflective coating inside. Manual-winding calibre 3861 drives the watch, with a Co-Axial escapement and a silicon balance spring, and it carries Master Chronometer certification good for 50 hours of power reserve. A tachymeter scale and small seconds sit alongside the chronograph function, and the steel caseback is transparent so the movement is visible. The black rubber strap closes with a steel foldover clasp. Water resistance is rated to 50 metres.