OMEGA Seamaster Diver 300M

The Omega Seamaster Diver 300M, reference 210.22.42.20.01.002, is a dive watch measuring 42 mm across in steel and Sedna gold. The case stands 13.56 mm thick with a lug-to-lug span of 49.9 mm, 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-in crown seals the case. Inside is the self-winding calibre 8800, a Co-Axial Master Chronometer movement certified by METAS and resistant to magnetic fields up to 15,000 gauss. The date sits alongside a helium escape valve, and the transparent caseback shows the movement. A black rubber strap closes with a steel pin buckle, and the screw-in crown helps hold the case to its 300 metre rating.