So-Called Dollars are a type of collectible coin that were primarily produced as souvenirs or commemoratives, often related to significant events or exhibitions. The term refers specifically to tokens or medals that are similar in size to the U.S. dollar but were not intended for circulation as currency. Created in various years, the 1899 examples commemorate the Trans-Mississippi Exposition held in Omaha, Nebraska, showcasing notable images and themes from the event. These pieces are highly sought after by collectors for their historical significance and unique designs.