About 8 months ago I started searching for error coins and it’s a lot harder than you’d imagine. I have searched many thousands of coins and found a number of interesting and odd coins and only 1 “true error”.
This is called a grease filled die and simply enough grease packed into it to either weaken or eliminate part of the image. But collectors consider them to be trash and worth face value. But I love them and keep many. I’ve got IN GOD WE RUST on a penny and quarters. Also 200 EARS OF FREEDOM. Missing stars, feet and other “mistakes”