1975-S Proof

The 1975-S Proof Roosevelt Dime is the standard S-mint proof issue of a year that produced one of the great rarities of modern US coinage in its proof line. Reported mintage came in at 2,845,450 sets struck at the San Francisco Assay Office, a modest uptick from the 1974 figure. The S mintmark appears below the date on the obverse in its standard proof position, with the design carried forward unchanged from the long-running Sinnock obverse and the torch-and-branches reverse. The famous 1975 No-S variety came from the same proof program; on the standard 1975-S Proof, the S must be present, sharp, and well-formed, and any apparent absence is either a heavily filled die (not a true No-S) or, in the rarest case, the genuine error confirmed by only two examples worldwide.

Authentication rests on standard proof diagnostics, with extra attention to the mintmark area because of the No-S situation. Genuine 1975-S Proofs show deeply mirrored fields with proof depth that no business strike can replicate, squared rim transitions instead of the rounded rims of a circulation coin, and crisp definition across Roosevelt's profile and the reverse torch. The S mintmark must be present and clearly visible; under magnification, a filled or weakly impressed S that is still detectable distinguishes the common date from any No-S claim, which requires PCGS or NGC certification with explicit attribution to be taken seriously. Cameo and Deep Cameo designations are awarded based on contrast between frosted devices and mirrored fields, with 1975-S DCAM populations sitting at a typical mid-clad-era level.

For collectors, the 1975-S Proof is common in the proof set itself and the standard target for type collectors filling in the year. PR69 DCAM examples are widely available through broken proof sets, and PR70 DCAM is the genuine condition rarity at the top of the grading scale, where prices climb sharply. Original 1975 proof set packaging still surfaces from estate liquidations and dealer inventories, and a small specialist market searches that material in the slim hope of finding a third No-S example. For broader context on the proof program that produced the famous 1975 No-S, see the Roosevelt Dime series history.