This is an S proof Jefferson nickel, I have never removed this coin from the set container it came in and I don't know what to call. for lack of a better word copper toning on the base part of Jefferson's face? Is it toning? or something else? And I don't know what to think about the doubling on the back? Please help.
If you are talking about on the outline of the nose profile, that would be Machine Doubling on post second issue. Proof coins are struck more than once) If so when you look at it closer, it will look like a 90 degree angle if that is what you are seeing. A higher bounce of Machine Doubling:
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