Queen's Beasts 5oz Completer coin - showing and tell and question about a spot on it as well

Hi everyone, my first post here, hope this is welcome. I've just received my Queen's Beasts 5oz Completer Proof coin, issue number 022, which I'm very excited about. Overall a gorgeous coin, but sadly there is a pinhead brown spot on the reverse rim, and I'm wondering if I can have some expert opinion on whether I should be concerned about this or not. Obviously it's a very limited edition coin (435 total issue, 300 in OGP), and at a high premium, so I'd like a perfect coin if possible. But, I have what I have. What do you think of the coin overall and the troublesome spot?

Thanks!!