Undated (1853-1854) Octagonal $1. BG-501. Rarity-5-. Liberty Head, "Humbert" Eagle Reverse. AU Details--Mounted (PCGS).Handsome khaki-orange surfaces offer uncommonly strong visual appeal for the assigned grade. Glossy in texture from a cleaning, a mount is located in the center of the reverse to further confirm this coin as a former jewelry piece. The "Humbert" eagle reverse is similar in style to that of the Humbert $50 "slugs" that circulated in California at the time of this issues appearance. From the firm of Frontier, Deviercy & Co., active in San Francisco in 1853 to 1864 at the very beginning of the California small denomination gold series.