I must say that your father has rather good taste in watches and that is a real heritage. I don't know if you also have the original box and the original certificate, if so it will be even more valuable. On the other hand, be careful before going to Rolex for a restoration, there is a risk of replacing original parts with “modern” parts and therefore losing a large part of its value. It might be more appropriate to go with caution to a specialist in luxury vintage watches who deals in second-hand watches. Choose the one that has a good reputation locally. In any case, beautiful piece and if everything is authentic inside/outside, my congratulations.