OMEGA Seamaster Diver 300M

Omega's Seamaster Diver 300M, reference 210.30.42.20.04.001, is a dive watch with a 42 mm steel case. It measures 13.56 mm thick and 49.9 mm lug to lug, with a unidirectional rotating bezel and a screw-down crown. A domed sapphire crystal with antireflective treatment on both sides covers the white dial. Inside is the Omega calibre 8800, a self-winding movement with Co-Axial escapement, certified as a Master Chronometer and resistant to magnetic fields up to 15,000 gauss. Power reserve runs to 55 hours. The date sits on the dial, and a sapphire display back shows the movement. A helium valve suits it to saturation diving. The steel bracelet closes with a foldover clasp with comfort setting, and the case holds its rating to 300 metres.