? not sure what you are asking. If you are asking if your coin is an error, it is not. It has been damaged.
I have searched thousands of nickels. This is the first! As I said in my post!! I’m not trying to catch an error coin by far.
Larry - you'll be amazed at what you find CRH. I found cents as thin as a razor blade; put into acid for a bit until it was razor thin. I've found dimes that way too; appear all copper as the cladding was eaten off first. You'll find button batteries...plastic tokens...and other round objects. That said, I found a gold Ducat nickel roll hunting and a silver bar in a cent roll. You never know what you'll find. I figure your nickel was damaged by some acid.