So-Called Dollars refer to a specific type of collectible coin primarily produced in the United States, primarily from the mid-19th century to early 20th century. They are not official currency but rather medals or commemorative pieces, often created to celebrate events, people, or places. The term derives from a book by Hibler and Kappen, which catalogs these pieces, with the first significant examples dating back to around 1870. Notably, the 1 One Dollar examples are often sought after by collectors for their historical significance and intricate designs.