Double eagle
…2 mm and are made from a 90% gold (0.900 fine or 21.6 kt) and 10% copper alloy and have a total weight of 1.0750 troy ounces (1.1794 oz; 33.44 g). The eagle, half eagle, and quarter eagle were defined by name in the act of Congress originally authorizing them. Likewise, the double eagle was created by the…