DEFDAM - Definitely Damaged because of alteration after it left the US Mint. Not a Mint Error of any kind. The explanation was given.
Heads I WIN ..... you'll never get tails so I win all the time. You can separate them easily, as long as you don't mind damaging them even more.
These are sold by the thousands as novelty coins and are legai to sell . It sounds like a easy way to make a few dollars