I have a lot of error coins. Some are d over d. Some rpm, struck through missing letters, die clash erant d over forehead, die break,crack skull, missing lincoln.struck through grease,phantom d, major struck through grease, filled letter, crack skull, misaligned dies,bie,repunched mint,double head,tripple punce mint,
Welcome to CT. Please post photos of the coin in question. Both sides, a close up of the area and please state a clear question and what it is you are seeing. You will get much better responses.
