Quote:
Originally Posted by morgman
I've never understood the need for the valve. If someone goes that deep, aren't they already dry in a diving bell so they could just unscrew the crown? LOL
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I don't think the unscrewing of the crown will do the trick. The air the diver breathes at that depth has a high percentage of inert Helium. Helium, being so microscopic by nature, manages to penetrate the watch and would explode the crystal with the ensuing internal built-up pressure.
The He valve then automatically releases this excess gas.
JJ