So-Called Dollars are a type of exonumic coin, often commemorative in nature, struck to honor specific events, individuals, or institutions. The term refers specifically to pieces that bear a denomination of "dollar" but are not currency authorized by the U.S. government. One notable example is the 1913 Liberty Head nickel, which, although not a So-Called Dollar in the traditional sense, captures the essence of collectible coinage due to its rarity and historical significance. Collectors often value So-Called Dollars for their unique designs and the stories they tell about American history.