OMEGA Seamaster Diver 300M

Omega's Seamaster Diver 300M ref. 210.20.42.20.03.001 is a dive watch with a 42 mm case in steel and yellow 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 screw-down crown works with a helium valve for saturation diving. Inside is the self-winding calibre 8800, a Master Chronometer movement resistant to magnetic fields up to 15,000 gauss with a 55 hour power reserve. A date window sits on the dial, and a sapphire display back shows the movement. The bracelet is steel and yellow gold with a foldover clasp. Rated to 300 metres, the case suits open water.