Collectible coins include various categories such as numismatic coins, bullion coins, and commemorative coins, which are valued based on factors such as rarity, demand, condition, and historical significance. The United States of America has produced an array of collectible coins, including the G 10, a term referring to a specific denomination of gold coinage. The U.S. Assay Office of Moffat & Humbert, active during the 19th century, played a significant role in assaying and minting gold coins in the western United States, further contributing to the numismatic landscape with its unique designs and historical context. These coins remain popular among collectors due to their historical relevance and the artistry involved in their production.

Item Denomination Series Year Mint
1852 G$10 Augustus Humbert K-10 G$10 U.S. Assay Office - Moffat-Humbert 1852 California