This is one of the not so frequent cases where an heirloom with significant history has also a remarkable market value from being by a big brand, great looking, men's automatic, in a word, desirable.
https://www.chrono24.it/rolex/bubble-back-bi-metal--id5640032.htm
A light, conservative restore doesn't have to be expensive, I don't see any casing part that needs to be replaced, so any reputable independent watchmaker will be glad to work on it. Sending it to Rolex (preferably Switzerland) could be three or more times more expensive, but still reasonable when all the above considered.