These turn up on eBay from time to time. I have a few myself.
Typically they use a 1342 movement which I think is one of the better quartz, although they are subject to failures in the electronics side. The watch is mostly mechanical with jeweled metal plates which is better than the plastic modern stuff. Eventually these will be the quartz watches repairable in the future, unlike the modern plastic ones.
Batteries are no longer made, but there is some which will work if an adapter is used. If the battery leaked then the watch movement is pretty much toast. (and the old batteries used mercury.)
I love playing with this sort of watch which I find to be a challenge. Typically one looks for a functioning example to swap the movements with. There has been a bit of price creep in the last few months as the supplies dwindle down. Even so they do not sell for much online since the buyers are only looking for parts watches. The value is in the sentimental nature. So it is a bit sad when these get dumped online since one can get a pretty nice mechanical for the cost of the repairs.
Opening them can be difficult without a good case knife and understanding how not to scratch the case.. Best to take it to a professional what has the proper tools.
You have a great heirloom. It should be enjoyed, even if the naysayers indicate otherwise.
