2004 -P Lewis and Clark error
Found in roll years ago. Does anyone know what type of error is this called? Thanks

Comments
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Can't tell if it's missing a layer or chemical pmd. Peace Roy
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Since a nickel isn’t clad, it looks like some kind of environmental or intentional chemical reaction to me.
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Nickels are a solid 75%Copper 25%Nickel alloy it can't be missing a layer.
It doesn't look like a improperly annealed planchet. I'm going with environmental damage or some post mint coating. Whatever is on it seems to be peeling on the Obv at the top of the head and rev under the STATES OF
Member of the ANA since 19820 -
That is post mint damage....either environmental or intentional. No numismatic premium. Cheers, RickO
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It’s a genuine Mis-annealed planchet
Retired Collector & Dealer in Major Mint Error Coins & Currency since the 1960's.Co-Author of Whitman's "100 Greatest U.S. Mint Error Coins", and the Error Coin Encyclopedia, Vols., III & IV. Retired Authenticator for Major Mint Errors for PCGS. A 50+ Year PNG Member.A full-time numismatist since 1972, retired in 2022.5 -
That is someone's science experiment
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PCGS will certify it as a Mint Error,
"Mis-Annealed Planchet Obv./Rev."Retired Collector & Dealer in Major Mint Error Coins & Currency since the 1960's.Co-Author of Whitman's "100 Greatest U.S. Mint Error Coins", and the Error Coin Encyclopedia, Vols., III & IV. Retired Authenticator for Major Mint Errors for PCGS. A 50+ Year PNG Member.A full-time numismatist since 1972, retired in 2022.3 -
Nice to know it’s a real error. I haven’t seen one like that before. I stand happily corrected.
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Improperly Annealed Planchet error 100% for sure, Nice coin.
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I like that nickel. Great find!
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Interestingly, once it becomes a genuine error, it turns from ugly to pretty.
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Agreed - it’s a genuine improperly annealed error. They don’t all look like this, but there are many of this type with the exact same surface colors.
The alloy includes copper which migrates to the surface when annealed too long or under too much heat.
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Thanks everyone for your responses. I appreciate it.
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If Fred says it's an error, believe me, it is.
bob
Registry: CC lowballs (boblindstrom), bobinvegas1989@yahoo.com1 -
I guess by pretty I meant interesting and by ugly, I meant not interesting.
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oops
WayneKennedys are my quest...
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Nice coin
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