OMEGA Seamaster Aqua Terra 150M

Omega's Seamaster Aqua Terra 150M, reference 220.52.41.21.10.001, is a 41 mm case in yellow gold. It measures 13.37 mm thick with a lug-to-lug of 48.01 mm, and the green dial sits under a domed sapphire crystal treated with antireflective coating on both sides. Inside is the self-winding calibre 8901, a Co-Axial movement certified as a Master Chronometer and resistant to magnetic fields up to 15,000 gauss. The movement runs on a freesprung balance with silicon spring and two barrels mounted in series, giving 60 hours of power reserve. A time zone function joins the date display, and the caseback is transparent. The screw-down crown protects the case, and the green rubber strap closes with a folding clasp in yellow gold. Omega rates the whole package to 150 metres.