Could a third one still be hiding in a 1975 proof set somewhere — or are two all there ever were? 👇
$506,250 — that’s what a ten-cent dime sold for, and the reason is something missing.
The coin is a 1975 Roosevelt dime struck as a proof at San Francisco — except its die never got the “S” mintmark that belongs above the date. Only two examples are known. Both were discovered by one California collector who ordered five 1975 proof sets at $7 each and found a No-S dime in two of them.
The PCGS Proof-67 (CAC) example: an Ohio family bought it in 1978 for $18,200, kept it for 46 years as a financial safety net, and sold it at GreatCollections on October 27, 2024 for $506,250 including the buyer’s premium, after 212 bids — a public auction record for the issue, two years ago today. CoinWeek told the full story of the woman behind both rarities this morning. The other example (PCGS Proof-68) sold for $456,000 at Heritage in September 2019 and resold privately five days later for $516,000.
The check is free: look at the dime in any old 1975 proof set. But it must be a mirror-like proof — a worn 1975 dime with no mintmark is an ordinary Philadelphia circulation strike worth ten cents.
🔎 Full write-up with diagnostics + mintage:
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Narration is AI-generated (synthetic voice). The coin photos shown are genuine public-domain U.S. Mint-design Roosevelt dime photos (via Wikimedia Commons), labeled on screen as type photos; the auction specimens’ own photos are not used.
source

https://thecoinwiki.co/usa/1975-no-s-dime/
My take: the $7 proof set is the best lottery ticket the Mint ever sold — and the tell is the mirror finish, not the missing letter.
Could a third still be hiding in a set somewhere — or are two all there ever were?