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The Only U.S. Gold Coin Struck on an Elliptical Planchet
The “Football-Shaped” Gold Eagle: A Unique U.S. Mint Error
A unique 2023 $5 Gold Eagle mint error shows how one tiny failure in the blanking...
Unique 1830 French 5 Francs Off-Center Error Survived Nearly 200 Years
A Royal French Coin With a Mint Error Twist
The Paris Mint struck millions of silver 5 francs coins during the 19th century. Most served...
Why Lincoln Cents Struck on Roosevelt Dimes Remain So Popular
A 1986 Lincoln Cent struck on a Roosevelt dime planchet grabs attention at first glance. It looks like a penny, yet it shows the...
Unique Lincoln Cent Mint Error Discovery: The Only Known Double-Struck Doubled Die
By Mike Byers at MintErrorNews for CoinWeek
A newly surfaced Lincoln cent discovery now ranks among the most important modern United States mint errors known.
This...
1937-D “3-Legged” Buffalo Nickel : A Collector’s Guide
1937-D 3-Legged Buffalo Nickel: Value, History, and the $84,000 Stack’s Bowers Specimen
By CoinWeek Notes
The 1937-D 3-Legged Buffalo Nickel ranks among the most famous modern...
The Unique Nürnberg “1700” Gold Piefort That Recasts a Famous Paschal Lamb Series
By Mike Byers - MintErrorNews .......
Unique Gold Piefort -Nürnberg "1700" 2 Ducats
Collectors know Nürnberg’s 1700-dated Paschal Lamb gold as one of the classic trophy...
Unique Bolivia 1942 50 Centavos Struck on a U.S. Wartime Nickel Planchet
The Bolivia 1942 50 Centavos struck on a U.S. wartime nickel planchet ranks among the most unusual discovery coins in modern numismatics. The Philadelphia...
1909-S/Horizontal S Lincoln Cent: The Sideways Punch That Became a Small-Cent Legend
The 1909-S/Horizontal S Lincoln cent holds a special place in American numismatics. It combines first-year Lincoln cent appeal with a minting blunder that collectors...
A Double-Struck Fugio Cent in Mint State? A Discovery That Stops Collectors in Their...
Finding a high-grade example of America’s first federally authorized coin is exciting. However, discovering one with a dramatic mint error is something else entirely....
PCGS Certifies Second-Finest Known Buffalo Nickel Struck on a Dime Planchet
A Stunning Mint Error Emerges from a Long-Held Collection
In late 2025, a remarkable discovery surfaced from an old-time mint error collection. Among several rare...
Unique 1963 Franklin Half Dollar on Wrong Planchet May Be an Experimental Test Piece
A Discovery That Rewrites What We Know
Every so often, a coin surfaces that forces collectors to rethink what is possible. This newly documented 1963...
First Auction Appearance: Legendary 1887 Morgan Dollar Error Heads to GreatCollections
A legendary rarity has surfaced, and collectors are paying attention.
One of the greatest U.S. coin errors ever discovered, the 1887 Morgan Silver Dollar double...
