It's nice to see he waterproofs his PAMS.
For the reps I really want to bring into water, I prefer to have this double checked locally.
But as far as swimming is concerned, 3 ATM is kind of risky, here's why :
http://www.chealwatch.com/water.htm
I have to find the ISO standard yet, but it seems that the tests are done in conditions where there's no movement, therefore whereas 3 ATM sounds good, it id eventually hardly enough.
When you look at the construction of the PAM case, you can also imagine it does not have an optimal waterproofness. And if any, it applies if all gaskets are greased.
On my 111, I found a gasket only on the caseback. Nothing on the side of the crown, and I'm not sure that our reps are really benefiting of the CG and lever advantages when it comes to water resistance : look if your crown really reacts (move a bit on the left) when you close the lever. On most unmodded PAMs, no.
Also, there's no rubber gasket under the crystal, only a thin (plastic ?) ring. Don't know if it's enough.
Just feelings.