what is this? i have found several pennies like this with little bubbles all over the fronts and backs. are these the ones considered "struck through grease" ? are they error coins or junk? thank you Read more: http://www.cointalk.com/private.php?do=showpm&pmid=323392#ixzz0yRMCoqry
Welcome to Coin Talk. Actually this is very common on zinc plated cents. It has nothing to do with "struck through", but instead is merely air pockets between the base metal and the plating. Some are more severe than others, but they are normal and do not constitute an error.
