1918-S

San Francisco's 1918 Mercury Dime mintage came in at 19,300,000 pieces, a solid figure that supported regional small-change needs across the West Coast and adjoining states. The branch mint was busy across denominations and the dime dies received routine preparation. Most coins circulated heavily through the 1920s and into the Depression years, when surviving rolls were progressively broken up. The result is broad availability in circulated grades and a more measured supply in Mint State. Gem examples with strong eye appeal exist but tend to surface from older collections rather than from active market flow, and condition rarity rises sharply once Full Bands enters the picture.

The S mintmark appears to the left of the fasces base on the reverse, and the punch on this issue is typically clean. Authentication priorities include checking that the surfaces around the mintmark are continuous, confirming date sharpness, and watching for cleaning, retoning, or whizzing that diminishes originality. Strike quality varies. PCGS and NGC award the Full Bands (FB) designation when the two horizontal bands across the middle of the fasces are fully separated, and on the 1918-S the qualifying examples are notably scarcer than on the Philadelphia issue of the same year. Look for crisp wing feathers, an even rim, and unbroken luster from the centers to the fields. Original toning frequently runs to soft russet or pale gold.

Circulated pricing is affordable, while Mint State and especially FB Mint State coins move into premium territory. Heritage Auctions and Stack's Bowers regularly handle gem FB pieces, and population reports illustrate how few qualify at MS66 FB and above. The date is a useful test of strike-grading discipline for set collectors. Roll-quantity finds from estate consignments occasionally bring fresh material to the market, though such groups are increasingly uncommon. Background on grade distribution appears in the Mercury Dime series history.