Darn, gigs up, you are actually correct in that this is a super rare error coin worth at least $10,000. Send it in to PCGS or NGC for grading and attribution as it will make selling much easier.
It is a fake. A Roosevelt Dime pretending to be a Gordian II. I know it's fake because he's facing the wrong way.
No offense to the OP, and I realize the OP is a new member here, but I have to say, with no disrespect (because we all have to start someplace) that I'm surprised that even a new collector of pocket change/rolls/etc. can't tell at first glance that the coin is damaged damage. I tell folks all the time "just because a coin looks 'different' doesn't mean it's an error coin".
Surprises me too that newbies can't understand what damage is .. but the other thread about a damaged plated zincoln is more the norm it seems.
The same thing has infected the NGC forums to the extent they’re not getting much else anymore. So sad.
This is not an error. Just PMD. There is no such thing as a certified coin dealer. Many of us are knowledgeable and not dealers, let alone "certified."
Please provide us all the intricate specifics of the US MINT process for creating Dies, master dies, etc and the entire minting process. Then please identify where during that process a coin like yours could have been manufactured?