40 Year Old Rolex Can't be Made Waterproof?

[Fredrik]

Originally Posted by Paka

Wow. I have several vintage Rolex watches with plexi crystals and I swim with them all. And I think I will continue to do so - the plexi shattering is propably quite rare.

Shattering is rare, what happens when plexi ages is that it degrades and gets micro cracks. That is the real problem. If you service your watches regularly and have the plexi replaced it should be fine.