In recent times, rare error dimes have captured the attention of coin enthusiasts, particularly after two exceptional examples were sold for an astonishing total of $850,000. These dimes, which may seem unremarkable at first glance, are incredibly valuable due to minting errors that make them unique collectibles. For numismatists and casual hobbyists alike, error coins offer an exciting opportunity to uncover the hidden potential and rarity of everyday currency.
In this article, we will explore two of the most notable error dimes that sold for remarkable prices: the 1968-S No-S Proof Roosevelt Dime and the 1975 No-S Proof Roosevelt Dime. We’ll also cover how to identify rare error coins and explain what makes them so sought after in the numismatic world.
Rare Error Dimes at a Glance
| Coin | Description | Recent Sale Price | Why It’s Special |
|---|---|---|---|
| 1968-S No-S Proof Dime | A proof coin with a missing “S” mintmark that should appear beneath the year. | Over $400,000 | Extremely limited examples exist; a notable proof coin error. |
| 1975 No-S Proof Dime | A proof coin lacking the “S” mintmark, with only two known specimens. | $450,000 | One of the rarest proof dimes ever made. |
What Makes Rare Error Dimes So Valuable?
Unintentional Rarity
Minting errors occur when coins are struck incorrectly, resulting in rare and unique features that make them highly desirable. Unlike mass-produced coins, error coins stand out due to their unusual characteristics.
For instance, both the 1968-S No-S Proof Dime and the 1975 No-S Proof Dime are missing the “S” mintmark, an essential identifier for coins minted in San Francisco. These production oversights have given rise to coins with extraordinary value, making them highly coveted in the collector’s market.
Record-Setting Sale of the 1975 Dime
In 2025, a 1975 No-S Proof Dime set a new benchmark, selling for $506,250—illustrating just how much these rare coins can fetch.
Historical and Numismatic Appeal
Error coins have a compelling historical value, serving as fascinating artifacts of the U.S. Mint’s production process. While their imperfections might appear as mistakes to the untrained eye, they are considered rare and important pieces of numismatic history.
High Demand Among Collectors
Coins like the 1975 No-S Proof Dime, with only two known examples, create intense demand among collectors. This rarefied supply, combined with collectors’ desire to own such elusive pieces, drives up their market prices significantly.
Spotlight on the 1968-S No-S Proof Dime
The 1968-S No-S Proof Dime is a prime example of how a simple minting mistake can result in a coin of immense value. Proof coins are specially crafted for collectors, with exceptional detail and mirror-like finishes. These coins typically undergo rigorous quality control, so when an error like the missing mintmark occurs, it stands out as an extraordinary rarity.
This dime should have a mintmark “S” below the date, denoting that it was struck at the San Francisco Mint. However, a small batch was struck without this crucial detail. In top condition, one of these dimes recently fetched over $400,000, confirming its importance to collectors.
The Unparalleled Rarity of the 1975 No-S Proof Dime
The 1975 No-S Proof Dime is one of the most coveted error coins in U.S. minting history. With only two known examples in existence, it holds the distinction of being one of the rarest proof coins ever produced. Like the 1968 version, the 1975 coin lacks the “S” mintmark. However, its extreme rarity and historical value have made it an extraordinary asset in the world of coin collecting. A 1975 No-S Proof Dime recently sold for $450,000, further solidifying its status as a numismatic treasure.
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How to Identify Rare Error Dimes
- Look for Missing Mintmarks Proof coins struck at the San Francisco Mint should have an “S” mintmark below the date. A missing mintmark is a clear indicator that you may be dealing with a rare error coin.
- Examine the Coin’s Condition Error coins in excellent condition are more valuable. Look for coins with minimal wear and a clean, polished finish to maximize value.
- Watch for Other Unique Features Error coins can sometimes have other striking anomalies, such as overdates or doubled dies. Using a magnifying glass or loupe can help you spot these subtle errors.
Other Famous Error Coins to Watch
While rare error dimes are highly coveted, they are not the only collectible coins with minting mistakes. Here are a few other well-known error coins worth noting:
- 1942/41 Mercury Dime Overdate – An overdate error where 1941 is struck over 1942, making it a popular and valuable piece among collectors.
- 1955 Doubled Die Lincoln Penny – Known for its doubled design elements, this penny is one of the most famous error coins.
- 1970-S Small Date Lincoln Penny – A subtle but valuable variation in the date font that is highly desirable among collectors.
Where to Find Rare Error Coins
Finding rare error dimes may seem like a long shot, but there are several ways to increase your chances:
- Check Your Change While proof coins don’t circulate, you might still stumble upon other valuable error coins in loose change.
- Examine Old Collections If you inherit or acquire an old coin collection, carefully inspect it for possible errors or unique features.
- Attend Coin Shows and Auctions Many dealers and auction houses showcase rare error coins, providing opportunities to either purchase or learn more about these items.
- Join Numismatic Communities Connecting with other collectors can help you discover rare coins and stay informed about the latest trends in the coin-collecting world.
Frequently Asked Questions About Rare Error Dimes
What is a mint error, and why are error coins valuable? A mint error occurs when a coin is mistakenly struck during production. These errors create one-of-a-kind coins that are highly collectible and valuable due to their rarity.
How can I tell if I have a No-S Proof Dime? Look for the missing “S” mintmark below the date. If the mintmark is absent, it may be a rare error coin worth significantly more.
Are all error coins valuable? Not all minting errors are valuable. The rarity of the error, the condition of the coin, and collector demand determine a coin’s value.
How do I confirm if my coin is valuable? Professional coin graders like the PCGS or NGC can authenticate and grade your coin, ensuring its value and increasing its marketability.
Final Thoughts
Rare error dimes, such as the 1968-S No-S Proof Dime and the 1975 No-S Proof Dime, highlight how minting errors can lead to coins of extraordinary value. While finding such a rare coin is a rare event in itself, the payoff can be substantial. Always be vigilant when inspecting coins—you never know what hidden treasure might be in your collection!
Have you discovered any rare coins in your collection? Share your experiences with us in the comments below! For more insights into valuable coins, check out our articles on pennies, quarters, and other numismatic treasures.