1948-S

The 1948-S Roosevelt dime is the third San Francisco strike of John R. Sinnock's design, with 35,520,000 pieces produced in the first full calendar year of dime work after Sinnock's death in May 1947. San Francisco's output edged up from 1947's 34,840,000, continuing the slow West Coast climb that ran through the postwar consumer expansion. The "S" mintmark sits on the reverse to the left of the torch base, the branch-mint placement Sinnock had engraved into the master dies before the series went to press. The obverse carries Roosevelt's left-facing portrait with IN GOD WE TRUST and LIBERTY, with Sinnock's "JS" initials at the bust truncation now widely recognized as the engraver's signature after the Joseph Stalin rumor of 1946 had faded from public memory. The reverse pairs a vertical torch with an olive branch and an oak branch, the three devices reading as liberty, peace, and strength. No proofs were struck in 1948 because the Mint's proof program had been suspended in 1942 for wartime conservation and did not resume until 1950.

The 1948-S follows the silver-era specifications: 2.5 grams, 17.9 mm diameter, 90% silver and 10% copper, with a reeded edge. Authentication on a circulation San Francisco strike begins with the weight check at roughly 2.45 to 2.55 grams in any reasonably preserved example, examination of the "S" mintmark for clean punching without remnant of another letter beneath it, and inspection of the reeded edge for uniform spacing. Strike quality on the 1948-S is typically strong, with the satin-to-frosty luster that distinguishes San Francisco planchet preparation in this period. The Full Bands (FB) designation, applied by PCGS and NGC to coins showing fully separated horizontal lines on the torch's central band, is the central condition-rarity overlay; the 1948-S delivers FB at a rate competitive with its Philadelphia and Denver counterparts in the same year.

The 1948-S is classified Regular in the Roosevelt series. PCGS and NGC populations are healthy across all circulated and lower Mint State grades thanks to roll-saving from original release, and MS-66 FB examples remain readily available at modest premiums. MS-67 FB is the realistic stopping point for most registry-set builders, with MS-68 FB rare enough to draw price step-ups well above bullion-floor pricing. For broader context, see the Roosevelt Dime series history.