1955 Proof

The 1955 proof Roosevelt dime is the Philadelphia silver proof of the year, struck in a Mint-reported mintage of 378,200 pieces. Proof Set sales had grown substantially since the 1950 restart, and 1955 marked another step up in collector distribution that reflected the rising postwar interest in numismatics. The coin carries John R. Sinnock's standard 1946 design, with the FDR portrait on the obverse and the torch with olive and oak branches on the reverse, produced from polished dies on polished planchets. The "JS" initials at the truncation of the bust appear with sharper definition than circulation work thanks to the careful die preparation. The 1955 proof falls in a transitional period for proof die preparation, with mid-decade adjustments to the polishing routine that reduced the consistency of strong frosted devices on later die strikes within a given session.

The 1955 proof follows the silver-era specifications: 2.5 grams, 17.9 mm, 90% silver and 10% copper, reeded edge. Authentication of a 1955 proof rests on distinguishing genuine proof characteristics from prooflike business strikes. True proofs show squared, sharply defined rims with the small step where rim meets field, fully mirrored fields with consistent reflectivity at every viewing angle, and crisp definition across the torch flame, leaves, letters, and FDR's hair. Cameo contrast on 1955 proofs is less consistent than on earlier 1950s issues because of the die-preparation changes that reduced frost retention partway through a die's working life. Cameo (CAM) populations are smaller than 1953 and 1954 proportionally, and Deep Cameo (DCAM) populations are genuinely scarce, with the strongest contrast examples concentrated among the earliest strikes from each newly polished die pair.

Survivor distribution covers PR60 through PR68, with PR66 and PR67 the most heavily traded grades. The DCAM premium widens sharply at PR67 and PR68 because of the limited supply of strong-contrast survivors. Hairlines from old wipes and small contact marks from set storage are the typical impairments below PR65. For broader context, see the Roosevelt Dime series history.