So-Called Dollars are a category of medals and tokens that resemble a dollar coin but are not official currency. They were often struck to commemorate events, anniversaries, or notable figures in U.S. history. The term originated from the 19th century, and the Hibler-Kappen catalog is a commonly referenced guide for collectors. An example is the 1904 So-Called Dollar, which recognizes the Louisiana Purchase Exposition, highlighting the cultural and historical significance of the event. Collectors value these pieces for their unique designs and historical context.