So-Called Dollars refer to a category of medallions or commemorative pieces that resemble U.S. dollar coins but are not official currency. The term originated after the 1892 Columbian Exposition in Chicago, where these pieces were minted to commemorate the event. The 1951 So-Called Dollar often features designs celebrating specific events or themes, such as anniversaries or notable figures, and is collected for its artistic and historical significance rather than its monetary value. Collectors often seek them for their unique designs and connection to American heritage.