1910-S

The 1910-S Indian Head Half Eagle is the San Francisco issue from the second year of Bela Lyon Pratt's incuse series. Production reached 770,200 pieces, one of the larger S-mint outputs in the run, yet the date carries Semi-Key status because of where the survivors actually sit. Most coins entered commerce on the West Coast and stayed there until the 1933 gold recall pulled them back for melting, and what remained tends to grade no finer than MS62. A buyer scanning a price guide for the 1910-S sees an attainable date; a buyer scanning auction archives for clean MS63 examples sees something quite different.

The condition rarity drives everything about how this coin behaves at market. NGC and PCGS together have certified only a small handful of pieces above MS63, with population estimates hovering around six to eight true gems across both services. The cause sits in the design itself: Pratt set the entire field as the high point and left no raised rim to shield it, so even a brief pass through commerce flattens the surfaces and drops a coin two or three grades below where it might otherwise land. A genuine 1910-S must weigh 8.359 grams within tight tolerance, and the S mintmark on the reverse should show the rounded San Francisco serifs from this period rather than the squarer punch shapes seen on later fakes. Strike-wise, the left side of the date often shows softness that affects the 19 in particular, a diagnostic to recognize rather than reject, since it appears on a large share of authentic pieces.

Auction comparables track the split between low and high grades cleanly. Heritage and Stack's Bowers regularly sell PCGS MS62 examples in the low four figures, and the same grade has firmed since the Fairmont Collection dispersals exposed how shallow the supply runs at MS63 and above. Circulated pieces in Very Fine through About Uncirculated remain reasonable for collectors building a date set, provided the fields are free of cleaning and the rims are intact. For more on Pratt's incuse design and how this San Francisco issue fits the broader run, see the Indian Head Half Eagle series history.