OMEGA Constellation

The Omega Constellation 131.25.29.20.99.001 measures 29 mm across in steel and Sedna gold. The case stands 12 mm thick with a lug-to-lug of 31.2 mm, and the grey dial sits under a domed sapphire crystal with antireflective treatment on both sides. Inside is the self-winding calibre 8700, a Master Chronometer movement certified by METAS and resistant to magnetic fields up to 15,000 gauss, with a silicon balance spring giving 50 hours of power reserve. A date function is set on the dial, and the watch carries diamonds. The transparent caseback lets the movement's Geneva waves in arabesque show through. The bracelet is steel and Sedna gold, fitted with a butterfly clasp with comfort setting. Water resistance is rated to 50 metres.