It's a 2016 gold buffalo that came mint sealed. One side is 2mm and the other 3mm: Weight is accurate 31.1g
Show pictures of the Obverse and Reverse sides also. Could be a high pressure strike to one side of the coin causing a Finned Rim or Misalignment.
Looks like a bit of Finning (Finned Rim) going on. I want to share this webpage with you - http://www.error-ref.com/finning/
Interesting (to me) observations: The rim is completely reeded through the wider part, and the rim gutter buildup along the edges seems normal, indicating the "leakage" defining "finning" isn't present. The strike seems pretty much normal across the coin. I see no real weakness in the strike, yet there's metal where there shouldn't be on the "thick" side. Both faces are well-struck and fully detailed. If the thin side were normal and the thick side too far apart, you'd expect to lose detail, which (although there's not much for detail) doesn't seem to have happened. RamziGuy225, do you have another of these to compare to? I'd be interested in knowing how much the edges "stick up" from the surrounding fields comparatively, and whether the coin in question stacks normally aside the tilt. I've seen this before; wish I remembered where and what we said about it.
YES! Fin and common. Sooner or later can be found on most coins. That's why some authenticators measure a coins thickness in four places around its circumference. Your coin is a really neat example!
Following Paddyman's reference I looked at the obverse side and saw a fattening of the rim over STATE OF AMERICA.
That one side is thick to the point it won't fit in a 32mm capsule (won't shut completely). I contacted Modern Coin Mart, will most likely exchange it for another.
Keep it, it's neat and the fin will not hurt it's value at all and some nut like me would pay a few dollars more just to get it.
On second thought. I was probably seeing a misaligned dies, which would account for the disparity of thickness.
Hey, I got one of those too!!! It's a 2016 50$ gold buffalo that appears to have been struck off center. The error is most notable off the bridge of the Indian's nose where the rim is wider, and behind the feathers of the back of his head where it's more narrow. Looking more closely I think the strike was deeper off the nose. It looks as though some metal tried to ooze out the side when struck. I just saw the term "finning" (I'm a novice), ...yes, that sounds exactly the way this anomaly looks. When viewing that edge of the coin straight on it is noticeably thicker. The feature is pronounced enough that I can feel a somewhat sharp burr on the rim when rubbing my thumb over it. Guest, email removed to prevent spam.
