OMEGA Speedmaster Moonwatch Professional

The Omega Speedmaster Moonwatch Professional 310.63.42.50.02.001 is a chronograph with a 42 mm white gold case. The case is 13.18 mm thick and 47.5 mm lug to lug. Calibre 3861 is a manual-winding movement with a Co-Axial escapement and a 50 hour power reserve. The balance is free-sprung with a silicon balance spring. The watch is a Master Chronometer with small seconds and a tachymeter. A domed sapphire crystal with anti-reflective treatment on the inside covers the silver dial. Omega rates the case to 50 metres, and the watch has a display back. A leather strap is fitted.