Here is a die clash I found the other day on a clad kennedy. I know they aren't incredibly rare, but this one is fun. It is actually visible to the naked eye. Most of them I have seen has one "horn" where this one has 3 pretty clear.<Edit> I'm posting another image of his hairline with a little "Superman" curl and some other artifacts visible. I'm beginning to wonder if it isn't a double-clash?

