OMEGA Seamaster Planet Ocean 600M

The Omega Seamaster Planet Ocean 600M, reference 217.30.42.21.01.003, is a dive watch with a 42 mm steel case. It measures 13.79 mm thick with a lug-to-lug of 47.5 mm, sized for a 21 mm strap. The flat sapphire crystal has anti-reflective treatment on both sides. Inside is the self-winding calibre 8912, a Master Chronometer certified movement resistant to magnetic fields up to 15,000 gauss, with a freesprung balance and silicon balance spring giving 60 hours of power reserve. The unidirectional rotating bezel and screw-down crown suit the watch's diving purpose, and the black dial rides on a steel bracelet with a foldover clasp that has a comfort setting and diver extension. Omega rates the case to 600 metres.