Let's see some better pictures. Looks like maybe some kind of planchet indent? Here is an example that I have but on a cent.
I don't "no" what a "planket" is.... But this coin appears to have been struck through a blank planchet. When a second planchet enters the chamber before the first has been fully ejected, sometimes the second leaves an impression on the first. It is hard to say whether yours is legitimate or not, but it appears to be genuine.
Struck through a planchet or late stage capped die, not sure which and it also shows a partial collar strike. Probably a tilted partial collar strike which could be caused by the other planchet causing the collar to be depressed on one side.
Hey, guys. Let's just provide the correct spelling in our posts and move on. (Let's make new members feel welcome, okay?) @jon deranleau We still haven't gotten those pics from you yet. Give us some better pics. I'd like to see both sides of this coin.
I respectfully have to disagree. Correcting the spelling or terminology will help new people learn the hobby rather than continuing to use incorrect terms or spelling. Common language is what keeps us all on the same page and furthering the hobby. It’s possible that the OP thought the correct term was planket and now they know better.
Agreed, Sir. That's why, if you read my post, you will notice it says, "Let's provide the correct spelling..." (and damp down the critical tone when addressing a new member's spelling). If I misspell something, please, let fly with the sarcastic tone. (My Minnesota-English needs to be kept in check at times.)