The 1975 No-S Proof Roosevelt Dime – A Rare Modern Miracle –

Most coins are made in huge numbers, and once in a while, a small mistake makes one of them incredibly valuable. That’s exactly what happened with the 1975 No-S Proof Roosevelt Dime. This tiny 10-cent coin, due to a rare minting error, became one of the most valuable modern coins ever discovered. At first glance, it looks like a regular dime, but what makes it special is what’s missing—the “S” mint mark that should be there. This small missing detail turned a common coin into a collector’s dream, with only two known examples in existence. Let’s take a closer look at this modern miracle and why it’s so important in U.S. coin history.

Coin Name: 1975 No-S Proof Roosevelt Dime

In 1975, the U.S. Mint produced proof coins for collectors at the San Francisco Mint. These proof coins are special—they are struck with extra care and shine like mirrors. Each proof coin made in San Francisco carries an “S” mint mark, which shows where it was made. However, in a rare mistake, a few Roosevelt Dimes were struck without the “S” mint mark, even though they were made in San Francisco. This error happened because the die (the metal stamp used to make coins) didn’t have the mint mark on it.

Only two examples of this 1975 No-S Proof Dime have ever been found. That makes it rarer than many famous old coins, even though it’s from the modern era. The two known dimes were found in proof sets that were sold to collectors before the mistake was caught. Because these coins were never supposed to exist, and because proof coins are carefully inspected before being sold, it’s almost impossible to find another one. That’s why this small dime has gained a huge value in the coin collecting world.

Why the 1975 No-S Dime Is So Valuable

Here’s why this tiny 10-cent coin can be worth hundreds of thousands of dollars:

• Extremely rare – Only 2 are confirmed to exist.
• Modern error – Unlike many rare coins, this is from the modern era, which makes it more interesting.
• Proof coin mistake – Proof coins are not supposed to have errors, making this even more surprising.
• High demand from collectors – Everyone wants the rarest coins, and this one is near the top of the list.

In recent years, one of these two known dimes sold for over $400,000 at auction, and its value may rise as more collectors become aware of it.

How to Know If You Have One

This rare coin only appears in 1975-S Proof Sets, which were sold to collectors. If you have one of these old sets, here’s what to look for:

• No “S” mark: The Roosevelt Dime should have an “S” mint mark above the date. If it’s missing, it could be the rare coin.
• Mirror-like finish: Proof coins have sharp details and a shiny surface.
• Original government packaging: The coin must be in a sealed proof set for best value.
• Get it graded: If you think you’ve found one, send it to a professional grading company like PCGS or NGC.

Remember—many people have tried to fake this error by removing the mint mark, so authentication is very important.

Table: Quick Facts – 1975 No-S Proof Dime

Feature	Details
Coin Name	1975 No-S Proof Roosevelt Dime
Year	1975
Mint Location	San Francisco (S), but no mark shown
Mint Mark	Missing “S”
Coin Type	Proof (not for circulation)
Known Examples	Only 2
Value at Auction	$400,000+

The 1975 No-S Proof Roosevelt Dime is proof that even modern coins can become legends. Born from a simple mistake, this rare dime has become one of the most wanted coins among collectors. With just two known examples, it holds a special place in U.S. coin history. If you or your family owns old coin sets from the 1970s, especially proof sets, you might want to give them a second look. What seems like a regular dime could turn out to be a life-changing discovery. Always check your coins—you never know what treasure might be hiding in plain sight.

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