So-Called Dollars are a category of numismatic items that commemorate events, people, or places, primarily issued in the United States. These tokens or medals often have a dollar denomination but are not considered legal tender. The term "So-Called Dollars" originates from the book by Harold A. A. Johnson published in 1960, which cataloged these items, including the notable 2917 So-Called Dollar, which is part of the broader collection of U.S. commemorative coins and tokens. Collectors value these items for their historical significance and artistic design.