The eagle was a United States $10 gold coin issued by the United States Mint from Coinage Act of 1792, 1792 to Executive Order 6102, 1933. The eagle was the largest of the five 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base-units of denomination used for circulating coinage in the United States prior to 1933, the year when gold was withdrawn from circulation.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 five main base-units of denomination were the Mill (currency)#United States, mill, the Cent (United States coin), cent, the Dime (United States coin), dime, the Dollar coin (United States), dollar, and the eagle, where a cent is 10 mills, 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 quarter eagle ($2.50), half eagle ($5), eagle ($10), and double eagle ($20) coins. With the exceptions of the Gold dollar, gold dollar coin, the Three-dollar piece, gold three-dollar coin, the three-cent nickel, and the Nickel (United States coin), five-cent nickel, the unit of denomination of coinage prior to 1933 was conceptually linked to the precious metal, precious or semi-precious metal that constituted a majority of the alloy used in that coin. In this regard the United States followed long-standing European practice of different base-unit denominations for different precious and semi-precious metals. In the United States, the cent was the base-unit of denomination in copper. The dime and dollar were the base-units of denomination in silver. The eagle was the base-unit of denomination in gold although, unlike "cent", "dime" (or "disme"), and "dollar", gold coins never specified their denomination in units of "eagles". Thus, a double eagle showed its value as "twenty dollars" rather than "two eagles". The United States' circulating eagle denomination from the late 18th century through to the first third of the 20th century should not be confused with the American Eagle bullion coins which are manufactured from American Silver Eagle, silver or American Gold Eagle, gold (since 1986), American Platinum Eagle, platinum (since 1997), or American Palladium Eagle, palladium (since 2017).

Years of production, and composition

Gold ''eagles'' were issued for circulation by the United States Mint from 1795–1933, ''half eagles'' from 1795–1929, ''quarter eagles'' from 1796–1929, and ''double eagles'' from 1850–1933, with occasional production gaps for each type. Except for the double eagle, the diameters of all these denominations were decreased over time. The following table presents the diameters of each of the denominations, in millimeters (mm), according to the first year that diameter was used:

22 karat "standard" gold

Originally the purity of all circulating gold coins in the United States was eleven twelfths pure gold (the same 22 Carat (purity), karats level as English crown gold) and one twelfth ''alloy''. Under U.S. law (Coinage Act of 1792), the alloy was composed only of silver and copper, with silver limited to no more than half of the alloy by weight. Thus, U.S. gold coins had 22/24 (22 kt or 91.667%) pure gold, ''at most'' 1/24 (0–4.167%) silver, with the remaining fraction, (4.167–8.333%), copper.Coinage Act of 1792 (Section 12
Coinage Act of April 2, 1792
at USmint.gov The weight of circulating, standard gold, $10 eagles was set at 270 grain (unit), grains (17.5 gram, g), half eagles at 135 grains (8.75 g), quarter eagles at 67.5 grains (4.37 g). This resulted in the $10 eagle containing of pure gold.

Gold content lowered to 89.92% (1834)

In 1834, the mint's 15:1 legal valuation of gold to silver (i.e. 15 weight units of silver and 1 weight unit of gold have the same legal monetary value) was changed to 16:1, and the metal weight-content standards for both gold and silver coins were changed, because at the old value ratio and weight content, it was profitable to export and melt U.S gold coins. As a result, the specification for ''standard gold'' was lowered from 22 karat (.9167 fine) to .8992 fine (21.58 kt).

Gold content raised to 90.0% (1837)

With the Coinage Act of 1837, passed on January 18, 1837, a small change in the fineness of the gold (increased to exactly .900 fine) was made, and the alloy (now 10% of the coin's weight) was again legally defined as silver and copper, with silver capped at no more than half. (i.e. 5% of total coin weight) The new standard for the $10 eagle was 258 grains (16.7 g) of .900 fine gold, giving pure gold content of 0.48375 ozt = 15.03 g, with other coins proportionately sized. Between 1838 and 1840, the silver content was reduced to zero—the eagle in 1838, half eagle in 1839, and quarter eagle in 1840,—resulting in U.S. gold coins being 90% gold and 10% copper. Using only copper as the alloy in gold coins matched longstanding English practice (see crown gold).Gold coin collector historical composition info
Accessed July 9, 2009. The new standard would be used for all circulating gold coins until U.S. gold coin circulation was halted in 1933.

Post-1982 eagle modern commemorative coins

As part of its Modern United States commemorative coins program the United States mint has issued several commemorative eagle coins. In 1984, Los Angeles XXIII Olympiad commemorative coins#Gold eagle, an eagle was issued to commemorate 1984 Summer Olympics, the Summer Olympics, and First in Flight Centennial commemorative coins#Gold eagle, another eagle was issued in 2003 to commemorate the Wright brothers first flight at Kitty Hawk. The pre-1933 .900 fine gold standard was restored, this would also be used in half-eagle gold commemoratives as well. The coins would be identical in fineness and size to their pre-1933 counterparts of the same face value. In 2000 a unique eagle, the Library of Congress bimetallic eagle, was issued commemorating the Library of Congress; it consisted of equal weights of an approximately 1/4 oz .9995 fine platinum core and a .900 fine gold outer ring.

List of designs

*Turban Head eagle, Turban Head 1795–1804 **Turban Head, small eagle 1795–1797 **Turban Head, large eagle 1797–1804 *Liberty Head (Coronet) 1838–1907 **Coronet, without motto 1838–1866 **Coronet, with motto 1866–1907 *Indian Head eagle, Indian Head 1907–1933

References

External links and references

US Gold Eagle by year and type.
Histories, photos, and more.
American Eagle production numbers
. {{DEFAULTSORT:Eagle (United States Coin) 1795 introductions United States gold coins Ten-base-unit coins Goddess of Liberty on coins Eagles on coins