OMEGA Constellation

Omega's Constellation ref. 131.33.41.21.04.001 measures 41 mm across in steel. The case stands 13.5 mm thick with a lug-to-lug of 44 mm, and the white 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 and a silicon balance spring, certified by METAS and resistant to magnetic fields up to 15,000 gauss. Two barrels mounted in series give it a 60-hour power reserve, and it adds a date function and a time zone display. The rotor and bridges show a rhodium-plated finish with Geneva waves, visible through the transparent caseback. A blue leather strap with rubber and alligator surface closes on a steel foldover clasp. Water resistance is rated to 50 metres.