2018-S Proof

San Francisco delivered 568,804 standard cupronickel-clad proof Roosevelt dimes in 2018 for the regular annual proof set, an 8 percent pullback from the 621,390 2017-S clad figure as proof-set subscriptions continued the slow downward trend that had governed the program since its mid-2000s peak. The 2018 proof set carried the America the Beautiful Quarters program's ninth-year five-coin set, the Native American Dollar, the Lincoln Shield cent, the Westward Journey nickel, and the Roosevelt dime in a single package. The S mintmark sat sharp above the date, dies were hand-polished to mirror finish, and the clad planchet was struck at higher pressure on a slower press to produce the squared rims and frosted devices that distinguish proof from circulation finish. The 2018 calendar also carried the special 50th-anniversary Silver Reverse Proof Set at SF, catalogued separately.

Authentication on a 2018-S clad proof rests on the standard finish diagnostics. Mirrored fields under 10x magnification show the deep reflective surface produced by hand-polished dies, the rim profile runs at a sharp ninety-degree transition to the field rather than the rounded business-strike profile, and frosted devices appear on examples that earn Cameo and Deep Cameo designations from PCGS and NGC. Cameo and Deep Cameo, the same effect at heavier frost depth, carry the premium pricing at PR69 and PR70. Weight should read 2.268 grams on a calibrated scale; the 2.50-gram silver-proof companion is the principal composition-level distinction from the 2018-S Silver Proof, and the edge view will show the dark copper-core sandwich rather than the solid silver-color profile of the silver version.

The 2018-S clad sits in the lower band of the late-2010s clad-proof Roosevelt range and trades at routine modern-proof pricing. PR69 DCAM is available at modest price levels, and PR70 DCAM forms the condition-rarity step where PCGS and NGC populations thin to registry-relevant levels. The 568,804-piece mintage carries no fundamental base-grade scarcity. Most surviving examples remain in original 2018 proof-set packaging. Collector demand concentrates on the PR70 DCAM tier and on full Cameo-DCAM date sets. For the 50th-anniversary year of SF proof production, see the Roosevelt Dime series history.