The unprecedented crossover underscores his personal efforts to combat “grade inflation.”
There are approximately 20 1852/1 Humbert $20s in private hands today. Between three and five examples are mint state. A pair of proof 1852/1 $20s are also known, the first of which traces its provenance back to Augustus Humbert, while the second originally belonged to Assay Office employee and founder of Kellogg & Company, John Glover Kellogg.
Obverse Description
Eagle clutching shield and ribbon UNITED STATES OF AMERICA. 884 THOUS: TWENTY DOLS.
Reverse Description
Engine turning AUGUSTUS HUMBERT. UNITED STATES ASSAYER OF GOLD. CALIFORNIA. 1852/1.
Catalog Information
View more data, info, and visualizations. Get access to retail and wholesale pricing as well as auction data.
Values
| Grade | CPG Value (Retail) | Greysheet Price (Wholesale) |
|---|---|---|
| PR65 | $1,140,000 | $1,234 |
| PR64 | $870,000 | $1,234 |
| PR63 | $1,234 | $1,234 |
Greysheet News
Dazzling rarities, free educational opportunities, family fun and more await at the Donald E. Stephens Convention Center
The designs will be featured on a $5 gold coin, a $1 silver coin, and a half dollar clad coin.




