The eagle is a base-unit of denomination issued only for gold coinage by the United States Mint based on the original values designated by the Coinage Act of 1792. It has been obsolete as a circulating denomination since 1933. The eagle was the largest of the four main decimal base-units of denomination used for circulating coinage in the United States prior to 1933, the year when gold was withdrawn from circulation. These four main base-units of denomination were the cent, the dime, the dollar, and the eagle, where a dime is 10 cents, a dollar is 10 dimes, and an eagle is 10 dollars. The eagle base-unit of denomination served as the basis of the gold quarter-eagle (US$ 2.50), the gold half-eagle (US $5), the eagle (US $10), and the double-eagle coins (US $20).