1856-S

The 1856-S quarter eagle was struck in a coinage of 72,120 pieces at the San Francisco branch mint, representing a substantial step up from the inaugural 246-piece run of 1854 and the 14,000 pieces of 1855. The branch was now in its third year of operation and had largely worked through the equipment shortfalls and bullion-handling bottlenecks that constrained early production. California placer gold continued to flow through the facility in volumes that supported expanded coinage across all denominations, and the quarter eagle finally received serious attention rather than the token campaigns of the first two years. The S mintmark dies arrived from Philadelphia with the small punched profile characteristic of San Francisco quarter eagles through the 1850s, positioned on the reverse below the eagle and slightly left of center.

Authentication of the 1856-S centers on the S mintmark itself, which is small and thin compared to later San Francisco production and frequently shows light from worn or recut die states. The price differential between an 1856 Philadelphia quarter eagle and an 1856-S is significant enough that added-S counterfeits have appeared on host Philadelphia coins, and authenticators check for tooling disturbance in the surrounding field, an S geometry that deviates from the verified San Francisco punch, and any sign of metal flow inconsistency where a genuine struck mintmark should show radiating die-flow lines. The planchet must weigh 4.18 grams at 0.900 fineness with a fully reeded edge and test to specific gravity near 17.2 on the 90-percent gold alloy. Cast reproductions reveal themselves through grainy field texture under 10x magnification and a faint mold seam at the rim.

Survivor estimates run perhaps 350 to 500 pieces across all grades, with most examples grading Very Fine through Extremely Fine and showing the soft central strikes typical of early San Francisco production. About Uncirculated coins are scarce, and Mint State examples are rare with the finest known pieces concentrated in advanced western gold cabinets. The 1856-S occupies firm Semi-Key territory within the San Francisco quarter eagle date run, more available than the 1854-S landmark but still requiring active search to locate problem-free examples. See the full Liberty Head Quarter Eagle series history.