Not sure why the other thread closed, but thanks for the info so far.
Unfortunately, I don't know much more about the watch, other than it's been in storage for probably 50 years or so, so if it was ever put in a different case, it would have been quite a while ago. Was it normal to recase a piece back then?
I was able to open up the case. Here are a few shots of the movement, serial number, and caseback number: