I think it's cool you're learning about the state of modern cents, but if you're looking for riches in there, you're "trarking up the wrong bee".
underneath that thin copper plating (they went from 95% copper with 5% tin and zinc to 2.5% copper with 97.5% Zinc ) .. and split plating you may start to get zinc rot underneath. want to see zinc rot to the extreme .. https://www.cointalk.com/threads/post-your-pmd-post-mint-damage-coin.318993/page-2#post-3122998