I cant comment in depth on WR of different models other then the one i have.
My Seiko gens are 100% WR
OK back to your question
My Noob mariner , without any mods , is tested up to 50 meters.
I swim on a regular basis with this baby without any problems.
My MBW1665 DRSD is also tested up to 50 meters and swimming is no problem.
In general for Rolex reps i dsicovered that you have to tighten the caseback because sometimes you can open them with a Sticky ball.
My PAM don't see any water not even a tap water.
If never tried to swim with them oand never had them tested.
Maybe next time i visit my watchsmith i will ask i'm to test my PAM111H from Tourby.
Carpe Diem
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