Going through a roll of really sweet 1961 D LMC's and ran across 5 with this tumor in and under the N of UNITED. First thing that came to mind was a chip or a crack, but this don't look like no chip or crack that I've seen. Second thing I thought of was a clash, but there's no other signs of clash on either side of the coins. There are others in the roll with the clash, but none are anything like these So before I run out of ideas or assume incorrectly, I'm going to ask the masses... What exactly is this???