1931-S

San Francisco struck 1,800,000 dimes during 1931, continuing the pattern of restrained branch mint output that defined the early Depression years. The figure sits close to its Denver counterpart from the same year, and some specialists place 1931-S in the semi-key category alongside it. Surviving examples saw the kind of extended circulation typical of Pacific Coast dimes from the era, passing through commerce until the country's economic engine eventually restarted. Collector hoarding of San Francisco Mercury dimes was modest before the 1940s, so most pieces in existence today were salvaged from circulation rather than preserved at the source. Locating a sharply struck Mint State example with original surfaces requires patience and a willingness to wait for the right offering.

Adolph A. Weinman's portrait and reverse fasces appear here with the strike characteristics typical of San Francisco production. Composition followed the standard 90% silver and 10% copper alloy, with each coin weighing 2.5 grams across a 17.9 millimeter planchet and a reeded edge. The "S" mintmark appears to the left of the fasces base on the reverse, and authentication should include checking the mintmark style against known genuine examples, since branch mint dates of this period occasionally attract attention from those producing altered pieces. Full Bands (FB) specimens, with complete separation across both horizontal bands of the fasces, are tough on 1931-S, where dies often produced softer central strikes. The Professional Coin Grading Service (PCGS) and Numismatic Guaranty Company (NGC) populations reflect this scarcity, with FB pieces drawing substantial premiums.

Auction records from Heritage Auctions and Stack's Bowers document the steep pricing curve once gem grades and FB designation combine. Population counts above MS66 FB are limited, and the combination of low original mintage with Depression-era circulation has produced a date where conditional rarity drives the market. Read more at the Mercury Dime series history.