Collectible coins often represent significant historical events, cultural milestones, or artistic achievements. The United States, for instance, issued various commemorative coins to celebrate landmarks and exhibitions, such as the 1939 and 1940 Golden Gate International Expositions. These coins not only serve as a medium of exchange but also as collectibles, appealing to numismatists who value their artistic design, rarity, and the historical context they embody. World’s Fair coins, like those from the 1939 and 1940 expositions, often feature unique designs celebrating innovation and progress, making them sought after by collectors.

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