So-Called Dollars refer to a series of commemorative metallic tokens and medallions that were produced in the United States, often in the form of a "dollar" but not issued as legal tender. The term originated from the 19th century and encompasses various designs celebrating events, anniversaries, and individuals. The 1926 So-Called Dollar specifically commemorates the Sesquicentennial Exposition held in Philadelphia, featuring intricate designs and often sought after by collectors for their historical significance and aesthetic appeal.