Recent Articles by this Author
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...
An Incredible Revolutionary War Discovery: The $7 Continental Currency Note with Taft Family Provenance
1776 $7 Continental Currency Note With Taft Family Provenance Links America’s Founding War to a Presidential Dynasty
A newly certified 1776 $7 Continental Currency note...
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...
James Earle Fraser’s Lost 1952 Lincoln Cent Pattern Reverse
The Lincoln Cent That Nearly Changed Forever
In 1952, the Lincoln cent nearly took a bold new direction.
The artist behind that proposed change was James...
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...
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...
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...
Unique Martha Washington Cent Test Piece Linked to Sacagawea Dollar Trials
Original article by Mike Byers in MintErrorNews - Edited and Reformatted by CoinWeek
Experimental coins often reveal hidden chapters of Mint history. Occasionally, one surfaces...
Unique Costa Rica 1948 50 Centimos Uncancelled Hubs Surface in Private Hands
By Mike Byers for MintErrorNews
In numismatics, discoveries that rewrite the census rarely occur. However, a newly surfaced pair of uncancelled obverse and reverse hubs...
Extremely Rare 1861-D $1 Gold Lamination Mint Error
A Confederate-Era Dahlonega Gold Dollar with a Story to Tell
In August 2024, an extremely rare 1861-D $1 Gold with a dramatic lamination mint error...
Unique 1945-D Lincoln Cent Struck on a Philippines 10 Centavos Silver Planchet
Off-metal errors rank among the most compelling artifacts in American numismatics. Those linked to World War II hold even greater appeal. One such piece...
Mike Byers Mint Error News – Unique Proof Ike Dollar “Clover Leaf” on Nickel...
"Clover leaf" Error By Mike Byers for Mint Error News ......
This remarkable "clover leaf" mint error features a Proof Eisenhower Dollar mated planchet set....
Unique 1795 Draped Bust Dollar Struck on a Copper Planchet
One of the Most Astonishing United States Numismatic Rarities Ever Discovered
Some coins stop collectors in their tracks. This 1795 Draped Bust Dollar struck on...
Coin Discoveries – Extremely Rare Double-Struck 8 Escudos Gold Mint Error
By Mike Byers, Mint Error News
Exceptional gold mint errors remain among the most elusive prizes in world numismatics. This newly discovered double-struck Mexican 8...
The Gold Buffalo Nickel That Shouldn’t Exist
A Unique 1913 Mint Anomaly That Redefines American Coinage
By Mike Byers , formatted by CoinWeek
True discoveries in U.S. numismatics are rare. Even rarer are...
An Incredible Collection of Seated Liberty Dime Die Caps Errors From the Carson City...
This is an amazing mint error discovery from the Carson City Mint!
Unbelievably, four Liberty Seated Dime die caps escaped the mint together! There are...
Unique Set of Martha Washington Test Pieces Features Five Experimental U.S. Mint Finishes
A spectacular, historically significant, unique set of Martha Washington Quarter-sized test pieces, struck circa 1999, offers a rare window into how the United States...
Newly Discovered 1945 Lincoln Cent Struck on 12% Silver Alloy Stuns Specialists
A World War II Lincoln Cent Error - Off-Metal Mystery in Gem Mint State Discovered
Key Highlights
New discovery: A 1945 Lincoln cent error struck...
