Let's suppose a
REALLY old single shot, bolt action .22 came into my possession.
Let's further suppose that I found the gun (especially if the husband of the little old lady who owned it, passed away, and she didn't know what to do with it, and didn't want to get involved in registry problems, or dealing with a firearm at all, since it was never registered).
If the gun is so old, that it doesn't have a serial number, what would you recommend I do... if ever this situation were to happen to me?