OMEGA Constellation

The Omega Constellation 131.30.41.21.01.001 is a men's steel model measuring 41 mm across. The case stands 13.4 mm thick with a lug-to-lug span of 44 mm, and the black dial sits under a domed sapphire crystal with antireflective treatment on both sides. Inside is the self-winding calibre 8900, a Master Chronometer movement certified by METAS with a Co-Axial escapement, resistant to magnetic fields up to 15,000 gauss. Two barrels mounted in series give it 60 hours of power reserve. The date appears alongside a time zone function, and the transparent caseback shows the finished movement. A steel bracelet closes with a foldover butterfly clasp with comfort setting. The case carries a 50 metre water resistance rating.