OMEGA Seamaster Aqua Terra 150M

Omega's Seamaster Aqua Terra 150M, reference 220.10.41.21.02.001, measures 41 mm across in steel. The case stands 13.2 mm thick with a lug-to-lug span of 47.9 mm, and a domed sapphire crystal with anti-reflective treatment on both sides covers the silver 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. It runs on a free sprung-balance with silicon balance spring and two barrels mounted in series, giving 60 hours of power reserve. The date sits alongside a time zone function, and the screw-in crown works with a transparent caseback to show the finishing on the rotor and bridges. A steel bracelet with a butterfly clasp completes the watch. The case carries a 150 metre water resistance rating.