World Numismatic News Archive

Category: Error Coins

Browse published WNN coverage with preserved archive URLs, cleaner cards, and clearer collector context.

News

Sealed Proof Set Mint Error: A 2004-S Dime With a 25% Indent That Should Never Have Left San Francisco

2026October 4, 2026By Numisman

A 2004-S proof Roosevelt dime with a 25% planchet indent has surfaced in its original sealed U.S. Mint proof set, the only…

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News

Unique Wilma Mankiller Quarter Struck on Nickel Planchet Certified by PCGS

Error CoinsJuly 7, 2026By Numisman

A discovery coin has just joined the shortest list in modern American error collecting. Professional Coin Grading Service has authenticated and certified…

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