Hi Chris--
First- welcome!
Second- Isn't this hobby great in the way you can put it away for years, and then pick it up later?
The stamp you're showing is R164, a common U.S. Revenue, with a Scott Cat Value of about $.30, whether used or unused.
Suggestion #1, would be for you to consider going out to
ebay and buying any copy of a Scott's U.S. Specialized catalog-- you can find them a few years old very reasonably. The prices will not have changed significantly, and it will still list every U.S. stamp you have from back in '61.
Next is to post with an image from a scanner instead of a camera-- much easier with the scanner, and much closer pictures.
Good Luck, welcome back, Ray