1998-S Proof

San Francisco delivered 2,086,507 standard cupronickel-clad proof Roosevelt dimes in 1998 for inclusion in the regular annual proof set, a modest step up from the 1997-S clad figure and a routine middle-range entry in the late-1990s clad-proof run. 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. Production protocol stayed unchanged from prior years, with the parallel silver-proof set drawing the subscriber attention toward the white-silver alternative.

Authentication on a 1998-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, the third-party grading designation that mirrored fields and frosted relief show clear contrast, 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 distinction at the composition level.

The 1998-S clad sits in the routine middle tier of the late-1990s regular proof issues, with PR69 DCAM available at modest price levels and PR70 DCAM forming the meaningful condition-rarity step where PCGS and NGC populations thin to registry-relevant levels. The two-million-piece mintage carries no fundamental base-grade scarcity, since the figure remains well above any practical rarity threshold for modern proof coinage. Most surviving examples remain in original Mint proof packaging, and the issue serves as a routine entry in any modern clad-proof Roosevelt date set. Collector demand concentrates on the PR70 DCAM tier and on full Cameo-DCAM date sets rather than on date-level scarcity. For the late-1990s San Francisco proof program and the broader Roosevelt arc, see the Roosevelt Dime series history.