What's the cause?
Bored and had a roll of Jeffs sitting on my desk, 2006P. 33 out of the 40 have some sort of luster break on them. Some obverse and some reverse. I have 9 out of that roll that have the same break from the CE in Montecello SW down. As shown. What is the proper name of this issue? Can't believe they are all struck through so must be something else happening.