1871-S

San Francisco struck only 22,000 quarter eagles in 1871, a modest figure that placed the issue well into branch-mint scarcity territory from the day it left the coining presses. West Coast commerce had begun to settle into more predictable patterns by the early 1870s, but the demand for small gold denominations remained inconsistent, and most surviving 1871-S pieces show heavy circulation wear consistent with active use along the Pacific trade corridors. Estimated survivorship sits in the low hundreds across all grades, with Mint State examples genuinely rare and almost always concentrated in lower uncirculated brackets.

Authentication centers on the S mintmark, which sits below the eagle's tail feathers on the reverse and should appear sharply formed with clean serifs and a distinct interior loop rather than a mushy or recut impression suggesting an added mintmark. A common counterfeit approach involves removing the date area or mintmark from a host coin and grafting on substitutes, so collectors should examine the field around both the date and the S under angled light for tooling marks, raised solder lines, or planchet disturbance. The genuine piece weighs 4.18 grams and measures 18 millimeters across, with reeded edge and coin alignment confirming basic specifications.

Among San Francisco quarter eagles of the 1870s, the 1871-S sits in the second tier of difficulty behind only the keys of the decade, and date-set builders consistently report it as one of the harder pieces to locate in original mid-grade condition. Most market appearances fall in the Very Fine through Extremely Fine range, with About Uncirculated coins commanding strong premiums and certified Mint State examples reaching levels that reflect their genuine condition rarity rather than any promotional pressure. Buyers should insist on third-party certification for any piece offered above mid-circulated grades, and careful study of high-resolution images of authenticated examples helps build the eye needed to spot problem coins before they become expensive lessons. Patience also pays in this market, since a single year of waiting can mean the difference between a cleaned coin offered as original and a genuinely choice piece that justifies its asking price. See the full Liberty Head Quarter Eagle series history.