So-Called Dollars refer to a type of commemorative coin or medallion that is not a legal tender but is often produced to commemorate a specific event, organization, or person. The term originated from the 19th century when certain medals resembling dollar coins were issued. The 1933 So-Called Dollar, specifically referencing the Chicago World's Fair and its associated events, gained considerable interest among collectors due to its historical significance and limited mintage. The desirability of these pieces often stems from their unique designs, cultural relevance, and connections to American historical events.