OMEGA Constellation

Omega's Constellation 131.33.41.21.01.001 has a 41 mm steel case with a black dial. The case measures 13.4 mm thick and 44 mm lug to lug, and the dial sits under a domed sapphire crystal with antireflective treatment on both sides. Inside is the self-winding calibre 8900, a Master Chronometer movement with Co-Axial escapement, certified by METAS and resistant to magnetic fields up to 15,000 gauss. It runs on a free sprung-balance with silicon hairspring and two barrels mounted in series, giving 60 hours of power reserve. The watch adds a date function and a time zone display, and the caseback is transparent. A black leather strap with rubber and alligator surface closes with a steel foldover clasp. Water resistance is rated to 50 metres.