The G 50 coins, also known as Augustus Humbert's gold coins, were minted in 1851 at the U.S. Assay Office in California. These coins were produced during the California Gold Rush to guarantee the authenticity and value of gold nuggets and dust being mined. The G 50 denomination refers to the coin's weight of 50 dollars worth of gold. Augustus Humbert, the chief assayer, oversaw the production, which featured his signature and the assay office's mark, making these coins sought-after collectibles in numismatic circles.

Item Denomination Series Year Mint
1851 G$50 Humbert 880 THOUS, No 50, Lettered Edge, K-2 G$50 U.S. Assay Office - Augustus Humbert 1851 California
1851 G$50 Humbert Target Rev, 887 THOUS, Reeded Edge, K-6 G$50 U.S. Assay Office - Augustus Humbert 1851 California