The Record-Breaking Auction Sale
On October 28, 2025, Great Collections made headlines with the sale of a rare coin that set an all-time auction record. The coin in question was the 1975 No S Proof Dime, which sold for a jaw-dropping $506,250. This specific dime is one of only two known examples in existence, making it a highly coveted item among collectors and investors alike.
Why is the 1975 No S Proof Dime So Valuable?
The extraordinary value of this coin stems from a minting error that occurred when it was first produced. The 1975 Proof Dime was released without the “S” mint mark, which made it an incredibly rare and valuable piece for numismatists. This error led to the coin’s massive demand at auction, and it eventually achieved a price almost thirty times higher than what it was originally purchased for in 1978.
Additionally, the coin was graded PCGS Proof-67 by the Professional Coin Grading Services (PCGS), a well-respected grading organization in the numismatic world. The coin also received approval from the Certified Acceptance Corporation (CAC), providing extra assurance for buyers in terms of its authenticity and quality.
A Long-Held Family Treasure
The 1975 No S Proof Dime had been in the same family’s possession since 1978. The coin was purchased for $18,200 by a collector from Ohio and his mother, who decided to hold onto this rare treasure for nearly 50 years. This long-held coin was consigned to Great Collections just two months before its record-breaking sale, marking the end of an era for the family that owned it.
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The Auction That Sparked Intense Interest
The sale of the 1975 No S Proof Dime generated tremendous interest, with 200 bids placed by eager collectors and investors. Despite the high price tag, the coin’s rarity and historical significance made it an object of desire, with many determined to secure it for their collections.
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