Doxa “Sub 300 T Conquistador”

Swiss Watch Fair 1968 BF 22
A diving watch created specially for underwater living experiments. The oxygen in underwater dwellings is saturated with helium. This very light gas seeps inside the case and can make it burst when the diver leaves the underwater dwelling. This professional diving watch incorporates a special valve which evacuates the helium. Automatic movement, case waterproof to 30 atmospheres, irreversible turning bezel, orange dial for legibility at great depths, scratchproof and shatterproof glass. (DOXA “Sub 300 T Conquistador”)