So-Called Dollars are a category of commemorative medals and tokens, which were produced primarily in the United States in the 19th and early 20th centuries. They often celebrate significant events, figures, or institutions, resembling the size and general appearance of silver dollars. The term "So-Called Dollar" was popularized from the 1930 reference book bynumismatist Harold E. Hoge. One notable example includes those minted in 1920, which commemorate events like the Panama-Pacific International Exposition, often highly sought after by collectors for their historical significance and artistic design.