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  2. Liberty Head double eagle - Wikipedia

    en.wikipedia.org/wiki/Liberty_Head_double_eagle

    The gold dollar and twenty-dollar piece were the first American federal coins on which the designer's initials appear—on the gold dollar, only the "L" is used. [30] Longacre's designs for the double eagle and the Type I gold dollar (1849–1854) are similar.

  3. San Francisco Mint - Wikipedia

    en.wikipedia.org/wiki/San_Francisco_Mint

    The San Francisco Mint is a branch of the United States Mint. Opened in 1854 to serve the gold mines of the California gold rush, in twenty years its operations exceeded the capacity of the first building. It moved into a new one in 1874, now known as the Old San Francisco Mint. In 1937 Mint operations moved into a third building, the current ...

  4. Double eagle - Wikipedia

    en.wikipedia.org/wiki/Double_eagle

    A double eagle is a gold coin of the United States with a denomination of $20. [1] (Its gold content of 0.9675 troy ounces [30.09 g] was worth $20 at the 1849 official price of $20.67/ozt.) The coins are 34 mm × 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 ...

  5. Gold dollar - Wikipedia

    en.wikipedia.org/wiki/Gold_dollar

    Beginning in 1854, the gold dollar was also struck at the new San Francisco Mint. [26] The continued flow of gold from California made silver expensive in terms of gold, and U.S. silver coins began to flow out of the country for melting in 1849, a flow that accelerated over the next several years as the price of the metal continued to rise. By ...

  6. United States Mint coin sizes - Wikipedia

    en.wikipedia.org/wiki/United_States_Mint_coin_sizes

    $25 American Gold Eagle 27 mm 17.5 g 1986–present $50 American Platinum Eagle 27 mm 15.6 g 1997–present Large Cent 28 mm 10.89 g 1793–1857 Half Dollar (Clad) 30.61 mm 11.34 g 1971–present Half Dollar (40% Ag) 30.6 mm 11.5 g 1965–1970, 1976(S) Half Dollar 30.6 mm 12.5 g 1796–1964 $50 American Gold Eagle 32.7 mm 31.1 g 1986–present

  7. Dollar coin (United States) - Wikipedia

    en.wikipedia.org/wiki/Dollar_coin_(United_States)

    The gold dollar weighing 1.672 g produced from 1849 to 1889 in 90% gold 10% copper. 1849 to 1853 gold dollar coins were 13 mm across and are called Type I. Type II gold dollars were thinner but larger at 15 mm diameter and were produced from 1854 to 1855. The most common gold dollar is the Type III, struck from 1856 until 1889.

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