$10 Eagle Gold Coins - INDIAN GOLD PIECE, LIBERTY, Indian Head.
The eagle is a base-unit of denomination issued only for gold coinage by the United States Mint. It has been obsolete as a circulating denomination since 1933. The eagle was the largest of the four main decimal base-units of denomination used for circulating coinage in the United States prior to 1933, the year when gold was withdrawn from circulation. These four main base-units of denomination were the cent, the dime, the dollar, and the eagle, where a dime is 10 cents, a dollar is 10 dimes, and an eagle is 10 dollars. The eagle base-unit of denomination served as the basis of the gold quarter-eagle, the gold half-eagle, the eagle, and the double-eagle coins.
 1846 O half eagle TEN DOLLAR GOLD XF-40 10$  US $600.00
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 1801 Baltimore newspaper 1800US MINT OUTPUT numismatics US $59.99
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 1855 LIBERTY HEAD GOLD EAGLE $10 AU58 NGC US $1,595.00
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 1881 $10 Gold Liberty Eagle Coin US $610.00
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 1899 GOLD COIN $10 DOLLAR LIBERTY EAGLE USA US $570.77
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 1912 $10 INDIAN EAGLE PCGS MS63 GOLD COIN MS-63 !!!!!!! US $2,285.00
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 1887-S $10 LIBERTY EAGLE PCGS MS62 SCARCE MS-62 P.Q. ++ US $1,369.00
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 1910-S $10 INDIAN PCGS MS62 SCARCE MS-62 GREEN HOLDER ! US $4,875.00
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 1911 $10 INDIAN PCGS MS63 MS-63 Looks Undergraded !!!!! US $2,374.00
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 1874 $1 INDIAN PRINCESS LARGE HEAD GOLD COIN NGC MS-61 US $456.60
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With the exceptions of the gold dollar coin, the gold three-dollar coin, the three-cent nickel, and the five-cent nickel, the unit of denomination of coinage prior to 1933 was conceptually linked to the precious or semi-precious metal that comprised a majority of the alloy used in that coin. In this regard the United States followed long-standing British and 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.