OMEGA Seamaster Diver 300M

The Omega Seamaster Diver 300M 210.30.42.20.01.010 is a dive watch with a 42 mm steel case. It measures 13.8 mm thick with a lug-to-lug span of 49.7 mm, and the unidirectional rotating bezel sits alongside a screw-down crown. A sapphire crystal with antireflective treatment covers the black dial. Inside is the self-winding calibre 8806, a Co-Axial Master Chronometer movement certified by METAS and resistant to magnetic fields up to 15,000 gauss, with 55 hours of power reserve. It has a helium valve for saturation diving and a display back showing the finished movement. The case is fitted on a steel bracelet with a foldover clasp. A screw-down crown helps keep the case rated to 300 metres.