So-Called Dollars are a category of numismatic items that are not official U.S. currency but resemble dollar coins, often created to commemorate events, places, or individuals. The term originates from medals produced for the 1892 World's Columbian Exposition. The Hibler-Kappen reference pertains to a catalog that classifies these pieces, providing details on their history, design, and significance. The 1939 issues include various pieces commemorating notable events, such as the New York World's Fair, and hold varying degrees of value based on their rarity, condition, and collector demand.

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
1939 Ny Hk-493 Lincoln Gold - Matte Sc$1 Ms Other / Varied So-Called Dollars - Hibler & Kappen 1939 Philadelphia