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Longacre's initials, JBL, appear on the truncation of the head. 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. [31]
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 ...
The San Francisco Mint began operations in 1854 at 608 Commercial Street, just west of Montgomery Street. [1] The building sat between Commercial and Clay Streets and a California Historical Landmark (number 87) plaque can be found today on Commercial. Since June 14, 1970, the building has been listed as a San Francisco Designated Landmark.
The gold dollar continued to be produced in the late 1850s, though mintages declined from the figures of two million or more each year between 1850 and 1854. Only about 51,000 gold dollars were produced in 1860, with over two-thirds of that figure at Philadelphia, just under a third at San Francisco, and 1,566 at Dahlonega. [35]
San Francisco: S All metals 1854 Facility open (mainly produces proof) ... Twenty-cent piece: 20¢, 1875–1878; Silver dollar: $1.00, 1878–1904, 1921-28, 1934-1935;
20 Proof 1832 (P) 2,362,000 (P) 5 Proof ... First time San Francisco produced the cent (P) 1,620 Proof ... United States half dollar mintage figures.