Diagnostics of Fake and Genuine Unplated Zinc Cents
in Cents, Planchet errors
How to tell a genuinely unplated zinc cent from one that has been corroded, stripped by reverse electrolysis or re-plated — and the surface clues that give each away.
Articles & Info
Cents
Decades of articles by CONECA's attributers and members, sorted by error type, coin series and feature.
Rockwell Hardness Test Marks On Lincoln Cents
Why the Mint tests planchet hardness, what a genuine test mark looks like on a finished cent, and what is only damage.
Placeholder: Doubled dies on Lincoln cents
in Cents, Doubled dies
Placeholder excerpt for an article about doubled dies on Lincoln cents. Replace with the real article's summary.
Placeholder: A new doubled die reverse
in Cents, Doubled dies, Recent Finds
Placeholder excerpt for an article about a new doubled die reverse. Replace with the real article's summary.