Collectible coins are often categorized into various types, including historical, commemorative, and thematic issues. In the United States, coins referencing significant events, like the 1939 and 1940 Golden Gate International Expositions, serve as notable collectibles. These coins often feature unique designs and are sought after for their artistic merit and historical significance. Additionally, World Fairs and Expositions have produced a range of collectible coins that celebrate advancements in technology, culture, and international cooperation.

Item Denomination Series Year Mint
1939-- (Unknown) World's Fairs & Expos - 1939-1940 Golden Gate Expo Other / Varied World's Fairs & Expos - 1939-1940 Golden Gate Expo 1939 Unknown