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Five Dramatic Paper Money Errors You Can Find in Circulation
By CoinWeek IQ
Paper money may look uniform and precise, but every note begins life as a physical object moving through massive, high-speed printing presses....
No FG Kennedy Half Dollars: The Vanishing Initials That Reward Sharp-Eyed Collectors
Some coin varieties announce themselves loudly. Others whisper. The No FG Kennedy half dollar belongs to the second group, and that quiet disappearance is...
1875 Indian Head Cent: The Intentional Variety That Turned Coinage Into Evidence
On some 1875 Indian Head cents, a small but unmistakable raised dot appears on the reverse. The dot sits near the upper-left corner of...
![1971 Jefferson Nickel Proof - Without Mintmark [LEFT} and With Mintmark [RIGHT]](https://coinweek.com/wp-content/uploads/2026/02/S-and-NoS-218x150.webp "1971 “No S” Proof Jefferson Nickel: The Only Missing Mintmark in the Series")
1971 “No S” Proof Jefferson Nickel: The Only Missing Mintmark in the Series
The 1971 No S Error - 1,655 examples - Check your Proof Sets!
The 1971 “No S” Proof Jefferson Nickel (FS-501) ranks among the most...
PCGS Certifies Unique 2022-D Wilma Mankiller Quarter Struck on a Nickel Planchet
A Modern U.S. Mint Error With a 90-Year Backstory
A dramatic modern mint error has surfaced in the American Women Quarters Program. PCGS has certified...
The 13 Rare Lincoln Cent Double Dies that Collectors Chase
A Chronology of the Lincoln Cent Double Dies
Lincoln cents look familiar. That makes them powerful.
Collectors know the design. Families have jars full of them....
1969-S Doubled Die Lincoln Cent: A Coin the Secret Service Thought Was Fake
The Secret Service Thought It Was A Fake
The 1969-S Doubled Die Lincoln Cent stands among the most dramatic modern U.S. Mint errors. It also...
The Philadelphia Find: Lonesome John Error Coin Time Capsule Surfaces With 1943 Steel Cent...
A 40-Year Philadelphia Time Capsule Reveals a Lonesome John Error Coin Treasure
A routine search on a digital marketplace led Daniel Sassa to one of...
Unique 1977 Lincoln Cent Struck in Aluminum: The Modern Penny That Should Not Exist
The 1977 Aluminum Penny That Should Not Exist
A 1977 Lincoln cent should be copper-colored. It should also weigh about 3.11 grams. Yet one extraordinary...
2013-D Lincoln Shield Cent Double Denomination: A One-of-a-Kind Modern Mint Error
The 11-Cent Error: A Lincoln Shield Cent Double Denomination Struck Over a Struck Dime
A 2013-D Lincoln Shield cent struck over a 2013-D Roosevelt dime...
Classic Mint Errors Collectors Still Chase the U.S. Overdate Coins of the 20th Century
The Mint Mistakes That Created America’s Most Famous 20th-Century Overdate Coins
Mint errors fascinate collectors, but they also create confusion.
Each month, grading services and dealers...
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...
