So-Called Dollars are a type of collectible medallion or token that commemorates an event, person, or place, typically related to the United States. These pieces are called "dollars" due to their size and resemblance to U.S. coinage, even though they are not actual legal tender. The 1881 So-Called Dollar, specifically, refers to medallions issued during that year, often celebrating events like the upcoming 1882 World's Fair in New Orleans. Collectors value these items for their historical significance and artistic designs, making them popular among numismatic enthusiasts.