GreatCollections is offering an exciting group of U.S. Major Mint Errors including the following proof errors. Proof mint errors are very rare. All five of these are Bicentennial (1776-1976-S) proof errors and include a double denomination, an off-center, an off-metal, a double struck off-metal and a dual date double denomination.

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U.S. Error Coins on GreatCollections.com


Mint Error 1776-1976-S Kennedy Half Dollar Silver Struck on 5c Planchet (5.1g) NGC Proof-63

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Mint Error 1776-1976-S Washington Quarter Clad Overstruck on 1969-S 1c NGC Proof-65 RD

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Mint Error 1776-1976-S Washington Quarter Clad Struck 45% Off Center Clashed Dies NGC Proof-64 UC

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Mint Error 1776-1976-S Washington Quarter Double Struck on 5c Planchet Clashed Dies (5.0g) NGC Proof-66 CAMEO

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Mint Error 1976-S Washington Quarter Struck on Philippine 5s (2.5g)
NGC Proof-66