Omega

European Watch Clock and Jewellery Fair 1993 BF 239
The “Omega Seamaster Professional Chrono Diver” is the world’s first chronograph able to work unhindered at depths of 300 m undersea. It features a screwed-in helium decompression valve and specially designed timepieces providing total operational reliability. An official chronometer certificate confirms the exceptional precision of this timepiece’s selfwinding movement. (OMEGA)