So-Called Dollars are a type of exonumia, typically commemorative pieces created to mark significant events or anniversaries, often relating to the United States. The Hibler and Kappen reference refers to a catalog that classifies and describes these tokens, with the 1939 date indicating a specific year of production or issuance. These items can be of varied metal compositions and designs, and their value can fluctuate based on rarity, historical significance, and condition. The term "Unknown" may refer to pieces for which there is limited information on origin or mintage.

Item Denomination Series Year Mint
1939 Ca Hk-478 Golden Gate Expo - Us Map Sc$1 Ms Other / Varied So-Called Dollars - Hibler & Kappen 1939 Unknown