OMEGA Seamaster Aqua Terra 150M

Omega's Seamaster Aqua Terra 150M, reference 220.10.41.21.01.002, has a steel case measuring 41 mm across. Thickness runs to 13.4 mm, with a lug-to-lug span of 48 mm. The self-winding movement is the calibre 8900, a Master Chronometer certified to 15,000 gauss with a free sprung-balance and silicon balance spring, and it runs for 60 hours on a full wind. A domed sapphire crystal with anti-reflective treatment on both sides sits over the black dial. Alongside the date, the watch has a time zone function and a screw-down crown, with a transparent caseback showing the movement. It is fitted to a steel bracelet closed by a foldover butterfly clasp with a comfort setting. The clasp helps hold the case to its 150 metre water resistance rating.