1921-S

San Francisco struck 548,000 Walking Liberty half dollars in 1921, the largest of the three 1921 issues but still a genuinely scarce coin and the third critical date in the famous trio that defines the series. Where the Philadelphia and Denver coins of the year are pursued for their tiny mintages alone, the 1921-S draws an extra layer of difficulty from production quality. San Francisco dies were used hard and often clashed, and the resulting coins show some of the worst strike characteristics seen anywhere in the series. Finding a 1921-S with a fully struck Liberty hand, complete skirt lines, and a defined eagle breast feathers area is the central challenge, and is what separates a four-figure coin from a five-figure one in higher grades.

Strike weakness on the 1921-S is so consistent that grading services factor it into how they assign Mint State designations, with allowances made for typical softness. Buyers should still demand evidence of full original luster rather than friction or rub on the high points, since rub can be mistaken for strike weakness by inexperienced eyes. Authentication concerns include added S mintmarks on genuine 1921 Philadelphia coins, so check the S punch style and its position against the eagle's tail feathers and the rock. The 1921-S mintmark is generally upright with consistent serifs, and any tilt, repunching artifact, or evidence of tooling around the device is a warning. Weight at 12.50 grams and diameter at 30.61 mm should hold within normal tolerance, and the reeded edge should show no seams or filing. Cherrypickers' Guide and the PCGS Photograde reference both publish die markers on the date that help confirm originality.

Auction records for the 1921-S in well-struck Mint State have reached well into five figures, with MS65 examples bringing thirty to fifty thousand dollars at major sales depending on strike quality. Professional Coin Grading Service (PCGS) and Numismatic Guaranty Company (NGC) populations thin sharply above MS64, and full-strike examples are particularly rare. Circulated grades remain accessible to most collectors, with strong demand keeping prices firm. The coin is one of the most discussed in the series for the strike-versus-grade tension it creates. See the Walking Liberty Half Dollar series history.