So-called dollars are a category of collectible coins that are not official U.S. currency but were issued as souvenirs or commemoratives, often in the form of medallions or tokens. The term originates from pieces that resemble a dollar in size and function, typically produced for special events, fairs, or exhibitions. The year 1908 is notable for the release of several so-called dollars, many of which celebrated events such as the St. Louis Exposition. These collectible items often feature unique designs and can vary significantly in rarity and value based on their historical significance and condition.