This coin is actually pretty interesting. It looks like it's 200 years old when it was only minted two years ago. Additionally, one would expect the zinc core to show through the thin layer of copper more prominently than it does. It's an interesting and unusual coin all around, really.
It has rolled around in a drum like a dryer with heat for a little while but not long enough that the edges start sinking in. I know because I worked for a company in my first job that served commercial laundries and we would find these in machines.
Yes, it is possible that it could have been left in a dryer for a long time, but I'm still doubtful that this sort of deformation can be formed evenly on both sides while bouncing around in a dryer. There is another possibility, but it is just a theory of mine....... The rim of the coin is the highest part and that is to prevent wear on all of the devices. Once the rim has worn down to a certain level, the devices begin to wear down as well. These devices include the bust, the legend, the date/mintmark on the obverse and whatever lettering or design that is on the reverse. You will also note that most of the lettering has grown fatter. That is because the incuse design on the dies are tapered rather than straight up and down. It's like a volcano erupting and blowing away the peak. What is left behind is larger in diameter. So, it is possible that someone had nothing better to do than to rub this coin back and forth on some form of abrasive material until this has occurred. Chris
It is possible - as long as it is just rolling around in the inner drum case and not hitting edges. I have some I have found in coin machine rejects recently - I even have a quarter that has that effect. On other coins the rims will start raising and shrinking the diameter of the coin if it somehow was not able to stay on the sides of the coin and was restricted to rolling around on the edges. The wear on the coin would be a little less even if someone was having a nothing better to do type of day.