1966

The 1966 Roosevelt dime represents the second year of the clad coinage program, with 1,382,734,540 pieces struck across all three mints under the no-mintmark directive that ran from 1965 through 1967. The Treasury continued the policy of striking dated coinage at Philadelphia, Denver, and San Francisco without distinguishing marks, both to discourage hoarding by date-and-mint collectors and to allow flexible production scheduling across the system. The reported 1.38-billion figure represents combined output from all three mints attributed to the 1966 date. Calendar-year freeze flexibility was still in effect, and some pieces dated 1965 continued to be struck into early 1966 before the dies were rolled over to the new date. The mintage drop from 1965's 1.65 billion reflects easing demand as the coin shortage receded and the public adjusted to the new clad coinage.

The 1966 follows the standard clad specifications: 2.268 grams, 17.91 millimeters, outer layers of 75% copper and 25% nickel bonded to a pure copper core, reeded edge, with a coin composition by mass of roughly 91.67% Cu and 8.33% Ni. Sinnock's 1946 design carries over unchanged, with the FDR portrait on the obverse and the torch with olive and oak branches on the reverse. Authentication of a 1966 rests on confirming the clad construction: weight of 2.268 grams versus the silver 2.5 grams, and the visible copper edge stripe between the cupronickel cladding layers. Strike quality through the second year of clad production was improving but remained variable, with some dies showing the soft central detail characteristic of the cupronickel planchet's resistance to flow, and FB (Full Bands) torch detail on the reverse remains the common authentication target for premium examples.

Survivor distribution skews toward circulated and low Mint State grades because hoarding pressure never materialized for the new clad issues the way it had for the late silver coinage. MS65 and MS66 examples are common from saved rolls, but MS67 and MS67 FB pieces are condition rarities because typical bag handling and the still-developing press calibration limited the supply of high-grade survivors. The 1966 trades at modest premiums over the 1965 in mid Mint State grades and at sharper step-ups at MS67 FB and above. For broader context, see the Roosevelt Dime series history.