OMEGA Constellation

Omega's Constellation 131.30.41.21.99.003 is a 41 mm steel watch with a blue dial. The case measures 13.45 mm thick with a lug-to-lug of 44 mm, and the dial sits under a domed sapphire crystal treated with anti-reflective coating on both sides. Inside is the self-winding calibre 8900, a Master Chronometer movement with a Co-Axial escapement and resistance to magnetic fields up to 15,000 gauss. It runs on a free sprung-balance with silicon balance spring 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 transparent caseback shows the rhodium-plated rotor and Geneva waves finishing. A steel bracelet closes with a foldover butterfly clasp with comfort setting. Water resistance stands at 50 metres.