I've taken the Liberty to post yours with a PR65 . Yours is the first one. Can you check the edge please . what do you see. Here's a thread from October . How to tell between Shield Nickel Proofs and Business Strikes? | Coin Talk
I think I see a flat rim with a squared edge but i have a hard time telling if that's the case it's in or something. Other examples I saw online had an edge like that, and some didn't but I thought maybe it had been cropped out of the picture or something? Anyway, appreciate the info