Last week I posted this thread
http://goccf.com/t/371382 about a 1971 D
Memorial cent I found with a minor obverse die clash, and a strange "missing" piece of one of the memorial columns, which was identified as the beginning stages of a die chip. Yesterday, while going through a box of pennies, I confirmed it. Here's that coin's younger brother with the same clash marks on the obverse and the die chip fully formed.

