1. There was a break in the cu-ni clad layer, allowing the copper core to well up to the surface either during the rolling or the striking. 2. There was a blob of copper in the copper-nickel cladding strip that did not mix with the nickel alloy. 3. A blob of copper was rolled into the clad strip, in which case there should be copper-nickel under the blob of copper.
I would need to see how the copper meets the copper-nickel to guess which one it is. TD
Numismatist. 50 year member ANA. Winner of four ANA Heath Literary Awards; three Wayte and Olga Raymond Literary Awards; Numismatist of the Year Award 2009, and Lifetime Achievement Award 2020. Winner numerous NLG Literary Awards.
1. There was a break in the cu-ni clad layer, allowing the copper core to well up to the surface either during the rolling or the striking. 2. There was a blob of copper in the copper-nickel cladding strip that did not mix with the nickel alloy. 3. A blob of copper was rolled into the clad strip, in which case there should be copper-nickel under the blob of copper.
I would need to see how the copper meets the copper-nickel to guess which one it is. TD >>
I believe (with the coin in hand) that your description in number 1 is the case.
If you are correct that the answer is #1, then your description at the top of the thread iws also correct. TD
Numismatist. 50 year member ANA. Winner of four ANA Heath Literary Awards; three Wayte and Olga Raymond Literary Awards; Numismatist of the Year Award 2009, and Lifetime Achievement Award 2020. Winner numerous NLG Literary Awards.
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.
Comments
The name is LEE!
1. There was a break in the cu-ni clad layer, allowing the copper core to well up to the surface either during the rolling or the striking.
2. There was a blob of copper in the copper-nickel cladding strip that did not mix with the nickel alloy.
3. A blob of copper was rolled into the clad strip, in which case there should be copper-nickel under the blob of copper.
I would need to see how the copper meets the copper-nickel to guess which one it is.
TD
<< <i>I don't believe it is since if the clad layer were missing, there would be a visible edge instead of an even surface across the coin. >>
That is not necessarily true.
-Paul
<< <i>There are actually three possibilities.
1. There was a break in the cu-ni clad layer, allowing the copper core to well up to the surface either during the rolling or the striking.
2. There was a blob of copper in the copper-nickel cladding strip that did not mix with the nickel alloy.
3. A blob of copper was rolled into the clad strip, in which case there should be copper-nickel under the blob of copper.
I would need to see how the copper meets the copper-nickel to guess which one it is.
TD >>
I believe (with the coin in hand) that your description in number 1 is the case.
what would you call this error (short name)?
TD
<< <i>Or: Defective Planchet Obv. >>
i would go with what fred said as well. jmho