1863-S

The 1863-S eagle marks the tenth year of ten-dollar production at the San Francisco Mint, struck in the depths of the Civil War while the Comstock and California fields kept the western branch in bullion even as the Treasury crisis paralyzed Philadelphia gold. A reported delivery of 10,000 pieces makes this one of the smaller working-strike eagles of the entire branch-mint era, and the survivorship is even thinner than the figure suggests: most of these coins entered Pacific commerce or moved out as international payment when greenbacks would not, and they came back ground down or did not come back at all.

Surviving population is estimated at roughly 50 to 60 examples across all grades, with the bulk concentrated in VF and EF. Properly graded About Uncirculated coins are very rare, perhaps ten, and the Mint State census stands at only two or three pieces, anchored by the PCGS MS61 from the Harry W. Bass Jr. holdings (Bowers & Merena, November 2000, $18,400) and an NGC MS61 that brought $37,950 at Goldberg in February 2009. CoinWeek's Civil War eagle survey ranks the issue as clearly rarer in all grades than the 1861-S and 1862-S. Authentication centers on the small upright S mintmark beneath the eagle, weight at 16.718 grams, and specific gravity near 17.2; the strike runs slightly sharper than its 1861–1862 SF stablemates, but heavy abrasions, peripheral softness on the stars, and old cleaning are endemic and do not by themselves indict a coin.

Collectors building a No Motto Liberty eagle date set hit a wall here. EF coins sit in the mid four figures when they appear, AU material trades in the mid five figures with patient bidders waiting years between offerings, and Mint State is essentially a museum-and-Bass-alumnus market, the finest known has been off the market since 2000. For the Civil War SF gold specialist this is the issue that defines the run, harder to land than the surrounding dates and rewarding the search with genuine western Civil War provenance. Full context for the design and its branch-mint output sits in the Liberty Head Eagle series history.