I have a very nice pocket watch my father used to use. It's still in the original box, it runs and according to the card in the lid, it originally cost $54.00, the Movement No. is 3313009, is Grade No. 912, and it's in Case No.63338. I had it cleaned up about 35 years ago and it still seems to run fine. Should I have some maintenance done to it, when was it manufactured, it's value and any other pertinent information that I should know. I tried to open the case to get additional information but don't have a proper tool.
Thanks for any help-Roger B.