So-Called Dollars are a category of collectible coins, specifically medals or tokens that commemorate an event, person, or place and are often issued in conjunction with a significant anniversary or celebration. These items are typically produced in the United States and bear a resemblance to dollar coins, though they usually do not hold official currency status. They became particularly popular in the late 19th and early 20th centuries and are characterized by vibrant designs and historical significance, making them sought after by numismatists and collectors.