The 1970-S No S Proof Roosevelt Dime stands as one of the most fascinating anomalies in the world of coin collecting. A minting error that was never intended for circulation, this coin is a rare find with a captivating backstory. Its allure lies in its accidental omission of the “S” mint mark, which is usually present on coins produced at the San Francisco Mint. This oversight has turned the 1970-S No S Proof Roosevelt Dime into a highly sought-after rarity, and a few of these coins have even slipped into general circulation, giving collectors a rare opportunity to discover a hidden treasure worth as much as $1,300.
In this article, we’ll explore the details of this remarkable coin, uncover its origins, and explain why it continues to captivate collectors even after all these years.
What Makes the 1970-S No S Proof Roosevelt Dime So Special?
| Feature | Details |
|---|---|
| Year | 1970 |
| Mint Location | San Francisco |
| Mint Mark | None (missing “S” mint mark) |
| Composition | 75% copper, 25% nickel over a pure copper core |
| Diameter | 17.9 millimeters |
| Edge | Reeded |
| Finish | Proof (mirror-like surface with fine details) |
| Estimated Quantity | Approximately 2,000 coins |
| Value Range | $500 to $1,300, depending on condition |
The Story Behind the 1970-S No S Proof Roosevelt Dime
The Roosevelt Dime, first minted in 1946, honors President Franklin D. Roosevelt and his support for the March of Dimes, a foundation aimed at combating polio. Proof coins, which are specially made for collectors, are known for their high-quality finishes, typically featuring a mint mark to denote where they were struck.
In 1970, most proof dimes from the San Francisco Mint were stamped with an “S” mint mark. However, an unusual mistake occurred during the minting process—some of the proof dimes were struck without the mint mark, creating a unique error. These rare dimes were included in proof sets distributed to collectors, and some even ended up in circulation over the years, increasing their rarity and making them highly prized among coin enthusiasts.
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Key Features of the 1970-S No S Proof Roosevelt Dime
If you believe you’ve stumbled upon one of these rare coins, here’s how to recognize it:
- Missing Mint Mark: The most significant feature is the absence of the “S” mint mark above the date on the obverse side of the coin. This is a telltale sign that the coin is a 1970-S No S Proof.
- Proof Finish: Unlike regular circulation dimes, this coin has a glossy, mirror-like surface with sharply defined details that are characteristic of proof coins.
- Rarity: Only about 2,000 of these error coins were produced, making them one