OMEGA Speedmaster Moonwatch Professional

The Omega Speedmaster Moonwatch Professional 310.63.42.50.10.001 is a chronograph in yellow gold with a case measuring 42 mm across. Thickness comes in at 13.18 mm, with a lug-to-lug span of 47.46 mm. A scratch-resistant sapphire crystal with anti-reflective treatment covers the green dial, and the transparent caseback shows the manual-winding calibre 3861 beneath it. This movement is a Co-Axial escapement design certified as a Master Chronometer by METAS, with resistance to magnetic fields up to 15,000 gauss and a power reserve of 50 hours. The dial carries a tachymeter scale and small seconds alongside the chronograph functions. Green alligator leather forms the strap, fitted with a foldover clasp in Moonshine gold. Omega rates the case to 50 metres.