OMEGA Seamaster Aqua Terra 150M

Omega's Seamaster Aqua Terra 150M, reference 220.10.38.20.03.001, has a steel case measuring 38 mm across. The case is 12.24 mm thick with a lug-to-lug span of 45 mm. Inside is the self-winding calibre 8800, 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. A domed sapphire crystal with antireflective treatment on both sides covers the blue dial, and a date function sits alongside a screw-down crown. The steel caseback is transparent, showing the movement. A steel bracelet closes with a butterfly clasp. The screw-down crown helps hold the case to its 150 metre water resistance rating.