OMEGA Seamaster Diver 300M

Omega's Seamaster Diver 300M ref. 210.32.42.20.01.003 is a dive watch with a 42 mm steel case, 13.8 mm thick with a lug-to-lug of 49.7 mm. The black dial sits under a domed sapphire crystal with antireflective treatment inside, framed by a unidirectional rotating bezel. A screw-down crown seals the case, and the transparent caseback shows the self-winding calibre 8806, a Co-Axial movement certified as a Master Chronometer by METAS and resistant to magnetic fields up to 15,000 gauss. Power reserve runs to 55 hours. A helium valve allows use in saturation diving. The watch comes on a black rubber strap with a steel foldover clasp, and the screw-down crown helps hold the case to its 300 metre water resistance rating.