Do think someone started a coin ring or a mint error.
jruckman. First thought was dryer rolling (a coin stuck in there, will have enough pressure to do that. This is different than drying "tossing" where it just dangles in dryer pan. We're talking about a wedge and rolling action.
BUT... typically when that happens, it FLATTENS the outer edge causing it to functionally shrink in diameter. What your penny looks like is a coin that is actually a double planchet that got squeezed something fierce when being stamped, and the only place for the extra copper to go was the lip.
The very best thing you can do is two things.
1) WEIGH it. If it weighs more than a regular penny, then bingo, you have a winner. Guaranteed mint error, and one that would be extremely rare. Either a double planchet, or something else. You'll need something that does 100'ths of grams.
2) MICROMETER CHECK. Is the diameter of the penny EXACTLY on point? If so, it wasn't a dryer roll, and something else is going on. The fact that the lip is so thick (from edge to center) is what gives me pause.
Personally, I'm banking on laundry roll, simply because the metal looks "squished" over the details of the coin. But, do #1 and #2 and get back to us, eh?
Skippy