The 1979 Susan B Anthony Dollar Errors represent some of the most fascinating minting mistakes in modern US coinage history. This was the first year these coins were produced, and the Denver Mint ...

Errors increase the value of collectibles because a limited number go into circulation before it is spotted and corrected.

While common, 1941 Lincoln Pennies can be highly valuable due to mint errors like the Double Die Obverse (DDO), Repunched Mint Mark (RPM), Off-Center Strike, and Die Cuds, with top errors reaching ...

Wrong planchet errors represent some of the most dramatic minting mistakes possible. Wrong planchet and off-metal errors occur when a correctly made blank from one denomination is accidentaly fed into ...