Well a week ago I was in Vegas wearing my very nice Breitling Chronomat Evolution. I went swimming in the pools and such. I have never had a problem in the 5 years I have owned this watch.
That night as I put it on to go out to dinner, I noticed a "fog" under the crystal. I thought maybe just the Vegas heat going from inside cold AC to outside heat.... none the less, it continued.
When I got back, the next weekend I took it into my watch repair place (authorized Breitling repair center) and they opened it up. Turns out water leaked through the crown, rusted the crown, bubbled up the face. They quoted me a price to fix... ouch this is going to be expensive. New crown, new dial (face), and matching hands to keep the same illumination to match the new dial. All with a regular servicing and mainspring... Plus Brietling is on vacation in Europe, so have to wait about 2 months. The repair bill is going to be about 10% the value of the watch, so I am having it done, but ouch! I guess I should always make sure the crown is tightly screwed down before jumping in the pool.
For now, I'll have to stick with my daily wear Breitling, a Colt Ocean automatic. That thing is built like a tank.