In the newer washing machines the is a small gap between the agitator and the tub itself. A couple of weeks ago I had two copper cents get stuck between that gap and they both rolled inside that gap and completely flattened the rims and made them look like a proof cent planchet. It appears your cent may have seen the fate as the two that I had.
Edited by Jim0815
06/01/2019 11:11 am