So-Called Dollars are a type of commemorative medallion issued primarily in the United States, often struck to commemorate significant events or anniversaries. These pieces typically feature a diameter similar to that of a silver dollar but are not legal tender. The term originated from the numismatic community, particularly around the early 20th century. The 1905 So-Called Dollar, for example, was created to commemorate the Lewis and Clark Centennial Exposition, reflecting the historical and cultural context of its time. Collectors value these items for their historical significance, artistic design, and connection to American heritage.