OMEGA Constellation

Omega's Constellation 131.20.34.20.63.001 measures 34 mm across in steel and Sedna gold. The case stands 11.7 mm thick with a lug-to-lug span of 37 mm, and the brown dial sits under a domed sapphire crystal with antireflective treatment on both sides. Inside is the self-winding calibre 8802, a Co-Axial Master Chronometer movement certified by METAS and resistant to magnetic fields up to 15,000 gauss, with a free sprung-balance and silicon balance spring. Power reserve runs to 55 hours. The dial carries small seconds at 6 o'clock and a date display, and the watch is set with diamonds. A sapphire display back shows the movement. The bracelet, in steel and Sedna gold, closes with a butterfly clasp that keeps the watch rated to 50 metres of water resistance.