So-Called Dollars are a category of commemorative medallions or tokens that were issued primarily in the United States, beginning in the late 19th century. Although they are often referred to as "dollars," they are not official U.S. currency but rather private issues that commemorate events, individuals, or organizations. The term "So-Called Dollar" originated from a 1938 book by Harold A. S. Smith, which cataloged these pieces. So-Called Dollars related to the American Revolution, such as those issued in 1775, commemorate significant historical milestones and often feature intricate designs. They are popular among collectors for their historical and artistic value.