OMEGA Speedmaster Moonwatch Professional

Omega's Speedmaster Moonwatch Professional 310.62.42.50.99.001 is a 42 mm chronograph cased in yellow gold. The case measures 13.18 mm thick with a lug-to-lug span of 47.46 mm. A sapphire crystal with anti-reflective treatment inside covers the yellow dial. Inside is the manual-winding calibre 3861, a Master Chronometer certified movement with a Co-Axial escapement and resistance to magnetic fields up to 15,000 gauss, giving 50 hours of power reserve. The tachymeter scale and small seconds sit alongside the chronograph function, and a transparent caseback shows the movement. A black rubber strap closes with a foldover clasp in Moonshine gold. The case is rated to 50 metres of water resistance.