OMEGA Constellation

Omega's Constellation 131.23.41.21.10.001 measures 41 mm across in steel and yellow gold. The case stands 13.5 mm thick with a 44 mm lug-to-lug, topped by a domed sapphire crystal treated against reflections on both sides. Inside is the calibre 8900, a self-winding movement with Co-Axial escapement certified as a Master Chronometer and resistant to magnetic fields up to 15,000 gauss. Two barrels mounted in series give 60 hours of power reserve. The green dial carries a date function, and the sapphire caseback shows the rhodium-plated rotor and Geneva waves finish beneath. A green leather strap with rubber and alligator texture closes on a steel foldover clasp. Water resistance is rated to 50 metres.