This coin came to me from a friend in Greece. It is a holed coin with the hole being off center. I don't know the minting process for these coins so don't know when or how this happens durring it's minting process.

Same story as the coin above but a different coin.

This error is called a "Ram Strike" and it is on a 1981 Canadian One Cent.

This error is what is called an "Indent" it also has "Brockage". An indent happens when two coins enter the collar and are struck at the same time. "Brockage" happens when one of those coins is an already struck coin and it leaves an impresion of the coins design on the other coin. You can see the denticles from the already struck coin in the indented area.