So-Called Dollars refer to a series of mediatory coins and tokens that were issued in the United States, particularly during the late 19th and early 20th centuries. The term originally described pieces that commemorated events or figures rather than serving as official currency. The 1890 So-Called Dollars, often linked to specific commemorative events such as the Chicago World's Fair, are highly sought after by collectors due to their historical significance and unique designs. The term "One Dollar" in this context may reference their nominal value, although many were produced in limited quantities, adding to their collectible appeal.