My daughter found this while were crh. Love that she loves crh with me. And finding this really gets her more interested in it.
It is called a Counterstamp. Created outside of the US Mint as a Novelty Item. Here is an old ad for one -
Here is one from my collection and my old thread - https://www.cointalk.com/threads/lincoln-and-kennedy-cent-counterstamp.288683/