Denver wood from the same year. This coin is silver under the brown patina - that's what caught my eye (searching). You can see it in certain spots due to the lighting:
New photos. This is very shiny and reflective in hand, and very splashy with reds, greens, violets, and blues. It's raw, so I can't satisfy anyone's curiosity about grade - including my own.
Thanks! I think it could be a 65 too. It's not likely to ever visit a TPG while I have it. This is my earliest Lincoln proof.