The 1975-No S Roosevelt Dime This coin is the king of Roosevelt dimes. It lacks the San Francisco “S” mintmark on a proof coin, making it one of the rarest. Only two are known to exist.
Auction History One example of the 1975-No S dime sold in 2019 for over $456,000 — making it among the most expensive dimes ever sold.
How It Happened A minting error during proof production led to the missing mintmark. The rarity was only discovered after coins reached collectors.
Error Coins Matter Serious collectors value mint errors highly. A tiny difference like a missing mark can create six-figure value.
Not Just Old Coins Unlike other million-dollar coins, this is a modern coin, proving age isn’t everything in coin collecting.
Authentication is Key These coins are carefully graded and authenticated by professional services like PCGS or NGC.
Collector Demand With only two known, demand has always far exceeded supply — a perfect storm for high value.
What It Means for You Check your proof sets! You might have a valuable piece of numismatic history sitting unnoticed in your collection.