Hi, welcome to the forum! Heirloom watches are the best kind of watch. But, if you want to wear the watch, forum members recommend a full maintenance service. There are lots of tiny moving parts inside an automatic watch - a few of which move at 5 to 8 times a second - and these parts need to be carefully evaluated for past damage, cleaned and precisely lubricated, and then tuned and adjusted. Then you'll have a timepiece you can rely upon for many years.
You can always get a second opinion from another watchmaker, so you may want to look around before deciding on one to do the work.
Try this search to find an AWCI (American Watchmakers-Clockmakers Institute) professional near you specializing in vintage watches. You may also try the
NAWCC (National Association of Watch & Clock Collectors) search page.