1870-S

San Francisco's 982,000-piece output for 1870 ranks as one of the higher Type 2 figures from this branch Mint, yet the survival profile tells the opposite story of its production. Most pieces entered heavy commercial channels and saw aggressive bag handling before being shipped overseas as bullion, leaving the date moderately scarce in mid-circulated grades, genuinely scarce in AU, and rare in any Mint State holder. The dies San Francisco employed for this Type 2 coinage are notorious for soft central detail, with hair curls behind Liberty's ear and the radial lines of several obverse stars frequently flat even on coins that otherwise grade choice About Uncirculated.

Population data underscores the paradox. Doug Winter and PCGS have long observed that examples grading finer than MS61 are rare, and the 2013 Saddle Ridge Hoard reset the ceiling rather than disturbing it. Of sixteen 1870-S double eagles in that California discovery, only a handful proved gradeable, and three certified PCGS MS62 essentially doubled the population at the finest-known tier. A reportedly Saddle Ridge-linked PCGS MS63 has since been documented as a finest-known outlier. Beneath that ceiling, bag-marking dictates assigned grades; clean fields are the exception, and reflective luster is rare given how aggressively SF Type 2 dies were pressed into service.

Adjacent context sharpens the picture. The 1869-S (686,750) and 1871-S (928,000) flank the issue in the SF Type 2 sequence, all sharing similar strike weaknesses but different population skews; 1870-S sits between them as comfortably available in VF through low AU yet quite difficult above MS61. Counterfeit risk is modest relative to Carson City peers, though altered-mintmark and tooled-surface examples surface periodically, making third-party certification effectively mandatory at any Mint State price level. Collectors building a date-run inevitably encounter this coin as the bottleneck that defines their grade ceiling, a recurring theme throughout the Liberty Head Double Eagle series history.