OMEGA Seamaster Diver 300M

The Omega Seamaster Diver 300M 210.20.42.20.03.002 is a dive watch with a 42 mm case in steel and Sedna gold. The case measures 13.56 mm thick with a lug-to-lug of 49.9 mm, and a unidirectional rotating bezel surrounds the blue dial. A sapphire crystal with antireflective treatment on both sides covers the dial, and the display back reveals the movement. Inside is the self-winding calibre 8800, a Co-Axial Master Chronometer movement resistant to magnetic fields up to 15,000 gauss, with 55 hours of power reserve. The watch has a date function and a helium escape valve beside the screw-down crown. It comes on a matching steel and Sedna gold bracelet with a foldover clasp. The crown helps hold the case to its 300 metre water resistance rating.