This is a deliberate anti-counterfeiting feature of the new coins. It’s hard to take a fake fully-reeded coin, and add just enough metal to the reeding to make one of the grooves perfectly vanish.
> This is a deliberate anti-counterfeiting feature of the new coins. It’s hard to take a fake fully-reeded coin, and add just enough metal to the reeding to make one of the grooves perfectly vanish.
OK, I am seeing a US Mint web page showing a silver one ounce coin that seems to have a similar feature. (So, maybe it could be a false alarm as far as the chiseling concern goes.) Thanks.