So-Called Dollars are a type of souvenir or commemorative medal that were produced in the United States, particularly in the late 19th and early 20th centuries. They often commemorate significant events, expositions, or notable figures and are named after the 1893 World's Columbian Exposition, where many were issued. These items typically resemble dollar coins in size and shape but are not considered legal tender. The category includes pieces like those from the 1893 exposition, which are highly sought after by collectors for their historical significance and artistic design.