

Cents are not my wheelhouse, but I am helping a friend work through a hoard of LMC-LSC. I ran across this 1964 cent with a date and Liberty that was visibly much thicker than the other 1964 cents. I did not find a match on CC, VV, Wexler, but since I'm not familiar with Lincoln cents, it's also possible that I made a mistake. Is this some form of minor
DDO or just
Die Deterioration or another easily explained phenomenon?