1975 Dime No Mint Mark: Value and the No-S Proof
Quick answer
1975 dime no mint mark: Philadelphia struck 585,673,900 with no mint mark, worth face value. Only 2 no-S proofs exist; one sold for $506,250 in 2024.
Updated 2026-09-25 · Sources: CoinWeek, Wikipedia
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Download on the App StoreWhat are the key facts?
- Philadelphia mintage (no mint mark): 585,673,900 for circulation (CoinWeek)
- Mint mark rule: No P used at Philadelphia before 1980; marks sit above the date on the obverse since 1968 (Wikipedia)
- Composition: Copper-nickel (75% Cu, 25% Ni) clad over a copper core (Wikipedia)
- Weight and diameter: 2.268 g, 17.91 mm (Wikipedia)
- 1975 no-S proofs known: 2 (CoinWeek)
- Highest sale: $506,250, PCGS PR67, GreatCollections, October 27, 2024 (CoinWeek)
Is a 1975 dime with no mint mark worth money?
No, a circulated 1975 dime with no mint mark is worth 10 cents. Philadelphia struck 585,673,900 dimes for circulation in 1975 and none of them carried a mint mark (CoinWeek), because the Philadelphia Mint did not use a P on dimes until 1980 (Wikipedia). A missing mint mark on a normal, worn 1975 dime is exactly what it should look like.
The valuable 1975 dime is a different coin: a proof struck at San Francisco without its S. Those came only from the Mint's proof sets, and only two are confirmed (CoinWeek).
The 1975 no-S proof dime and its sales
In 1975 San Francisco was helping with business-strike production and received dies without mint marks; some of those dies were polished and used to strike proofs, which is how the S went missing (CoinWeek). Both known coins came from proof sets bought directly from the Mint. Sales reported by CoinWeek:
- PCGS PR68: $349,600 at Stack's Bowers on August 13, 2011, then $456,000 at Heritage Auctions on September 6, 2019.
- PCGS PR67, the Ruth E. discovery coin, CAC approved: $506,250 at GreatCollections on October 27, 2024.
How to tell a no-S proof from an ordinary 1975 dime
- Finish: a genuine no-S proof has sharp details, deeply mirrored fields and frosted design elements (CoinWeek). A circulation dime has satin lustre when new and dull, worn surfaces after use.
- Where it came from: both known coins came out of sealed proof sets. CoinWeek notes that finding one outside a proof set would take extraordinary luck.
- Mint mark position: on a 1975 dime the mint mark, if any, sits above the date on the obverse (Wikipedia). A D there means Denver; nothing there on a worn coin means Philadelphia.
- Wear: any wear, scratches or bag marks rule out a proof that left the Mint in a sealed set.
CoinLens reads the date and mint-mark area from a clear photo; for how dates and marks are read see the dates and mint marks guide.
Other dimes missing a mint mark
The 1975 is not the only case. Wikipedia lists proof dimes issued without the S in 1970, 1975 and 1983. It also notes that some 1982 Philadelphia dimes left the Mint without their P; these business-strike errors may sell for $50 to $75 (Wikipedia). Unlike the 1975, a 1982 dime with no mint mark is an error worth checking, because Philadelphia did use a P that year. Dimes dated 1965 to 1967 carry no mint mark from any mint (Wikipedia).
If you think you have one
Compare it with the checklist above first. If it is a mirror-finish proof from a 1975 proof set with no S, send it to a major grading service before doing anything else; CoinWeek says an authenticated example is best sold through a major auction house. See should you grade a coin for how grading works.
How this page was made
Research and drafting for this page were assisted by AI and checked line by line against the sources listed below. Every price names the price guide, dealer listing or auction and the date it was read; where we could not confirm a figure we say so instead of estimating. If you find an error, tell us and we will correct it.
FAQ
Is a 1975 dime with no mint mark worth money?
Not if it is a normal circulated coin. Philadelphia struck 585,673,900 dimes without a mint mark in 1975, and they are worth face value (CoinWeek). Only proof dimes missing the S are rare.
What is the error on the 1975 dime?
Some 1975 proof dimes from San Francisco were struck with dies that had no S mint mark. Only two are confirmed (CoinWeek).
Is a 1975 dime worth $400,000?
Only the no-S proof. One sold for $456,000 in 2019 and the other for $506,250 in 2024 (CoinWeek). An ordinary 1975 dime is worth 10 cents.
How can you tell if a 1975 dime is no S?
It must be a proof: mirror-like fields, frosted design and sharp details, normally still in its proof set (CoinWeek). A worn coin with no mark above the date is a regular Philadelphia dime.
Where is the mint mark on a 1975 dime?
Above the date on the obverse; mint marks have been placed there since 1968 (Wikipedia).
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Sources
Compiled by the CoinLens editorial team
Every fact on this page is taken from the sources listed above; numbers and prices are copied from the source, and prices name the guide or auction and its date. Research and drafting were assisted by AI, and each claim was then checked against the cited sources. Checked 2026-09-25. We do not buy, sell or grade items; the app identifies what you photograph and points you to these references.