1991-S Proof

San Francisco delivered 2,867,787 proof Roosevelt dimes in 1991 for inclusion in the annual proof set, the lowest regular S-mint proof Roosevelt mintage since 1986 and a 13 percent drop from the 1990-S figure. The reduction tracked softer proof-set subscription numbers as the early-1990s recession reduced collector discretionary spending; production protocol and strike standards stayed unchanged. The S mintmark sat sharp above the date, dies were hand-polished to mirror finish, and the cupronickel-clad planchet was struck at higher pressure on a slower press to produce the squared rims and frosted devices that distinguish proof finish from circulation strike. Die preparation and strike consistency held to the established standard.

Authentication on a 1991-S proof rests on the standard finish diagnostics: deeply mirrored fields under 10x magnification, sharp ninety-degree rim profile rather than the rounded business-strike field-to-rim transition, and frosted devices on examples that earn Cameo and Deep Cameo designations from PCGS and NGC. Cameo, the contrast between mirrored fields and frosted relief, and Deep Cameo, the same effect at heavier frost depth, carry the price premium at PR69 and PR70. Die-polish lines visible at angle under loupe magnification confirm proof finish, and the S mintmark must show sharp serifs and clean fields around the punch. The 1991-S strike quality is consistent across the production, and Cameo and Deep Cameo certification rates run within the routine range; PR70 DCAM examples remain achievable from original Mint packaging.

The 1991-S sits in the routine middle tier of early-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 population reports support genuine premiums. Most surviving examples remain in original Mint proof packaging, and submission economics keep raw market supply thin relative to the underlying mintage. The lower mintage relative to other late-1980s and early-1990s regular proof issues has not translated into meaningful base-grade premiums, since 2.86 million pieces is still well above any practical scarcity threshold for modern proof coinage. The 1991-S is a routine entry in any modern proof-Roosevelt date set and shows no fundamental scarcity outside the top-grade tier. For background on the San Francisco proof program through the late 1980s and early 1990s, see the Roosevelt Dime series history.