OMEGA Constellation

Omega's Constellation 131.30.41.21.99.002 is a men's steel model measuring 41 mm across. The case stands 13.5 mm thick with a lug-to-lug span of 44 mm, and a domed sapphire crystal with anti-reflective treatment on both sides covers the green dial. Inside is the self-winding calibre 8900, a Master Chronometer movement 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 transparent caseback shows off the rhodium-plated rotor and Geneva-waved bridges. It is fitted to a steel bracelet with a foldover butterfly clasp that includes a comfort setting. Water resistance is rated to 50 metres.