Um, doesn't it work like this:
- helium will accumulate inside the watch when under lots and lots of pressure
- the risk is that the helium will blow off the crystal when the watch is resurfacing, ie decompressing
- the valve allows the helium to escape when decompressing so that the crystal is not blown off
__________________
Lee
This is my watch. There are many like it but this one is mine...
Flickr
Blog
|