Collectible coins, often referred to as numismatic items, encompass a wide variety of types, including commemorative coins, historical pieces, and So-Called Dollars. The term "So-Called Dollars" refers to a series of medals and tokens issued primarily in the late 19th and early 20th centuries, which often resemble U.S. silver dollars but are not official currency. Coins featuring the date 1776 typically commemorate the American Revolution or the founding of the United States, while the 1 One Dollar denomination represents a significant monetary unit in U.S. currency, often sought by collectors for its historical and aesthetic value. Collectors of U.S. coins often seek items with unique designs, limited mintages, or notable historical significance.