OMEGA Constellation

The Omega Constellation 131.23.41.21.06.002 measures 41 mm in steel and yellow gold. The case stands 13.45 mm thick with a lug-to-lug span of 44 mm, and the grey dial sits under a domed sapphire crystal with anti-reflective treatment on both sides. Inside is the self-winding calibre 8900, a Master Chronometer movement with Co-Axial escapement that resists magnetic fields up to 15,000 gauss and runs on a free sprung-balance with silicon spring. It carries a date function and a time zone display, and the caseback is transparent so the finishing on the rotor and bridges is visible. Power reserve runs to 60 hours. A brown leather strap with a rubber and alligator surface closes on a steel foldover clasp. The case holds a 50 metre water resistance rating.