If you can, post a picture. All we can tell you is the approximate date of manufacture from the serial number. If you want to know more, a factory letter may help.
Unless it is in REALLY bad shape I would not have it re-blued. That will seriously affect collector value, and, at least for me, would alter something that was in the family. All those dings have a story. Now if they could only talk.
Clean it up, post some pics and then shoot the heck out of it. They're a lot of fun.
Jim