Coins classified as "So-Called Dollars" are a category of commemorative pieces, often produced to honor specific events, people, or ideas, and are usually not intended for circulation. The term originated from the 19th century, particularly around the time of the California Gold Rush. The 1854 So-Called Dollar refers to a specific type of medal struck to commemorate the opening of the International Exposition in New York City, featuring designs associated with American themes. These items are often sought after by collectors due to their historical significance and unique designs.