The following mint errors are featured in the upcoming March 2026 Error Coinage US Coins Showcase Auction #60524.

Images Courtesy of Heritage Auctions, HA.com


1971 Quarter Dollar, MS64
Overstruck on a 1970 Quarter

1971 Washington Quarter -- Double Struck on a 1970 Washington Quarter -- MS64 NGC. An extremely rare error type with a Washington quarter overstruck on a struck quarter of a different date. In this case, it is a 1971 quarter overstruck on the 1970 coin. The host coin's reverse undertype appears throughout the obverse, and its obverse undertype appear throughout the reverse. The date of the 1970 host coin can be seen between the eagle's right (facing) wing and the rim. Delicate champagne luster complements satiny luster on each side, with overall pleasing eye appeal and bold primary strike.

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1996 Lincoln Cent
Three Planchet Bonded Trio
MS66 Red NGC

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(1999-2020) Philadelphia Mint Washington Quarter
Double Struck, Obverse Die Cap
MS64 NGC

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2004-P Florida Statehood Quarter
Struck Four Times, Third and Fourth Strikes 50% Off Center
MS64 PCGS

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2000-P Sacagawea Dollar
Struck on a 25C Planchet
MS64 NGC