Posted 09/14/2010 03:07 am
I feel this is a die chip on the lower part of the mint mark. If it were an S it would be a lot larger and the S mint mark was used on 1968 forward coin proof Quarters forward. You can see the post in the Center of the mint mark has broken off the die, leaving the center part of the mint mark not formed. So it would seem logical that this die is aging quickly and the area in question could be chipping in that area. At first I wondered if it were part of a P mint mark, but they didn't use the P mint mark designation on quarters till 1980.
