Things have been quiet here lately, so I thought some of you might like to see this. I've shown the coin before, but I've been playing around with the new photo accessories and got this picture. I can't recall ever seeing such a clear clash in a picture. I'm a terrible photographer, so it was pure luck. The light hit it just right. No matter how hard I try, I can't get an obverse picture of similar quality - or even close.
It's called a massively strong die clash! I love the rim cud too. It adds character, not that this coin needs any. What year is this Jefferson? Another fine one, OEG!
Actually, the Wikipedia definition is pretty good: A die clash occurs when the obverse and reverse dies are damaged upon striking each other because a planchet is not between them. Due to the tremendous pressure used, the parts of the image of one die may be impressed on the other. When planchets are then fed between them the resulting coins receive the distorted image. A well-known example is the "Bugs Bunny" Franklin Half Dollar of 1955, where part of the eagle's wing from the reverse gives Franklin the image of protruding teeth.