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.
| coinage-type | Pioneer & Territorial Gold |
| desg | PR |
| edge | Reeded |
| material | Gold |
| mintage | 2 known |
| ngc-id | ANGJ |
| obverse-description | Eagle clutching shield and ribbon UNITED STATES OF AMERICA. 884 THOUS: TWENTY DOLS. |
| pcgs-link | 10194 |
| pcgs-number | 10194 |
| reverse-description | Engine turning AUGUSTUS HUMBERT. UNITED STATES ASSAYER OF GOLD. CALIFORNIA. 1852/1. |
| variety | Augustus Humbert |
| variety-2 | K-9 |
| year-display | 1852 |