From what i understand...(im probaly wrong) this was thought to be a doubled die at one point..but was debunked as a damaged die. So,technically its a mint error? lol. Pretty neat reguardless,Plz correct me if im wrong. Cheers
It may be,I got the info from A 1971 error and varietys video from World numismatic news,I just assumed it were true. Idk...