OMEGA Constellation

Omega's Constellation, reference 131.23.41.21.03.001, measures 41 mm across in steel and Sedna gold. The case stands 13.45 mm thick with a lug-to-lug of 44 mm. A domed sapphire crystal with anti-reflective treatment on both sides covers the blue 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, with a free sprung-balance and silicon balance spring. Power reserve runs to 60 hours. Beyond the date, the movement adds a time zone function, and a display back shows off the rhodium-plated rotor and Geneva waves. The blue leather strap, with rubber and alligator leather surface, closes with a steel foldover clasp. Water resistance is rated to 50 metres.