OMEGA Seamaster Aqua Terra 150M

Omega's Seamaster Aqua Terra 150M, reference 220.10.41.21.10.001, has a steel case measuring 41 mm across. The case stands 13.2 mm thick with a lug-to-lug span of 47.9 mm. A domed sapphire crystal with antireflective treatment on both sides covers the green dial. Inside is the self-winding calibre 8900, a Master Chronometer movement with a Co-Axial escapement, resistant to magnetic fields up to 15,000 gauss and rated for 60 hours of power reserve. The screw-down crown and transparent caseback are both worth noting, along with the time zone function and date display. A steel bracelet with a butterfly clasp completes the watch. The case carries a 150 metre water resistance rating.