OMEGA Seamaster Aqua Terra 150M (Summer Blue)

Omega's Seamaster Aqua Terra 150M, reference 220.10.41.21.03.005, has a 41 mm steel case. Thickness measures 13.2 mm, with a lug-to-lug of 47.9 mm, and the blue dial sits under a domed, scratch-resistant sapphire crystal treated with antireflective coating on both sides. Inside is the self-winding calibre 8900, a Master Chronometer movement with Co-Axial escapement and a silicon balance spring, resistant to magnetic fields up to 15,000 gauss. It runs on two barrels mounted in series and stores 60 hours of power reserve. Beyond the date function, the watch adds a time zone display, useful for tracking a second time zone when travelling. A screw-in crown secures the case, and the steel bracelet closes with a butterfly clasp. This Master Chronometer is rated to 150 metres of water resistance.