Looking thru my pennies I found one that seems to have a small "indent?" on it the top left side taking up the I in the word IN. What is this kind of mistake called? In my opinion it don't seem to be environmental
@CJLA It looks like it was caused by a strikethrough. Grease and debris probably built up in one of the recesses of the obverse die, and when it fell out onto an incoming planchet, it was struck into it. When the coin was ejected, the built-up grease and debris fell out. Chris
One more thing, Since I save my odd coin finds... Would I put this under "strikethrough"? Is this the correct term? Thanks