OMEGA Seamaster Aqua Terra 150M

Omega's Seamaster Aqua Terra 150M, reference 220.12.38.20.10.001, comes in a 38 mm steel case. It measures 12.24 mm thick with a lug-to-lug of 45 mm, and the lug width runs 19 mm. A domed sapphire crystal with antireflective treatment on both sides covers the green dial. Inside is the self-winding calibre 8800, a Master Chronometer movement with a Co-Axial escapement and resistance to magnetic fields up to 15,000 gauss, giving 55 hours of power reserve. The date sits on the dial, and a transparent caseback shows the movement through the back. A green rubber strap closes with a steel foldover clasp. The screw-down crown helps the case keep its 150 metre water resistance rating.