OMEGA Seamaster Diver 300M

Omega's Seamaster Diver 300M ref. 210.30.42.20.01.001 is a dive watch with a 42 mm steel case. The case measures 13.56 mm thick and 49.9 mm between the lugs, and a unidirectional rotating bezel surrounds the black dial. A domed sapphire crystal with antireflective treatment on both sides covers the dial, and a screw-down crown works with a helium valve for saturation diving. The self-winding calibre 8800 inside is Master Chronometer certified, resistant to magnetic fields up to 15,000 gauss, and stores 55 hours of power reserve. A date function sits on the dial, and a sapphire display back shows the movement. The steel bracelet closes with a foldover clasp that has a comfort setting and diver extension. This case is rated to 300 metres.