So-Called Dollars are a type of collectible token or medal, often produced to commemorate significant events or anniversaries, which are not legal tender but resemble coins. Originating in the 19th century, they gained popularity for their artistic designs and historical significance. The term "So-Called Dollar" was popularized by numismatist Harold E. Hibler in the 20th century. The 1951 So-Called Dollars are particularly noteworthy for their commemorative nature, celebrating specific events or institutions, and they can be of great interest to collectors of Americana and numismatic history.