So-Called Dollars are a type of commemorative medal or token that were issued primarily in the United States, often to commemorate significant events, anniversaries, or individuals. The term "So-Called Dollars" was popularized by numismatist Grover Criswell, who published an important reference book on the subject. The 1936 So-Called Dollars are particularly notable as they were produced for various expo-related events, including the Century of Progress International Exposition held in Chicago. These pieces often feature unique designs and can vary widely in material and rarity, making them of interest to collectors.