Interesting pressure testing video..

[buddy13]

Originally Posted by rolexertion

I think your 'complete disagreement' is based on a misunderstanding of my point. I of course did not say this test should not be done, I simply said it would not show much. Your point that, after the seals are shown to be good it would be a good idea to test to the depth rating, is correct.

I'm not sure at what internal pressure the HEV on watches like the PO, the DS, the SD work, but they might allow internal pressure to escape under vacuum as well, giving the false impression that the crystal gasket is not sealed properly. Afer all, they are there to prevent the popping off of the crystal, aren't they?

They open at around 3 bar so no problem with vacuum pressure testing ...