So-Called Dollars are a category of collectible medals and tokens that resemble U.S. dollars but were not issued as legal tender. The term often refers to pieces celebrating events, people, or places, especially those minted for the centennial of the United States in 1876. The Hibler-Kappen catalog is a recognized reference guide for these items, detailing the various types and their characteristics. The 1876 So-Called Dollars commemorate the 100th anniversary of the U.S. and are sought after by collectors for their historical significance and artistic design.