The worry on this one is potential water damage that could affect the running of the watch. If only a small trace of moisture has got in, and it’s clean water not salt water, the chances are it’ll be OK but the movement will probably need stripping down, cleaning and re-oiling. It also depends how long the water’s been in.
The mystery is how the water’s found its way in, these watches shouldn’t leak.
I could have a look at this. I’ve serviced a couple in the past and I have the correct sized O rings for the crown, pushers and caseback. At this age I’d expect all the seals to still be OK.
PM me if you’re interested.
Paul