So-Called Dollars are a category of numismatic collectibles that originated in the United States during the mid-19th century and continued into the 20th century. They are not official U.S. currency but are typically commemorative pieces issued to mark significant events or anniversaries. The term "So-Called Dollar" was popularized by numismatist Harold S. W. Sutherland in his 1934 book. The 1946 So-Called Dollar was struck to commemorate the International Exposition held in New York, featuring various artistic designs and often made of silver or bronze. Collectors value these pieces for their historical significance and artistry.