1792 USD is in double standard of gold and silver. According to the Coinage Law promulgated that year, one dollar is equivalent to 37 1.25 grains (24.057 grams) of pure silver or 24.75 grains (1.6038 grams) of pure gold. Until 1873. A dollar worth 24.057 grams of silver is about the equivalent of a Spanish silver dollar.
Because the U.S. government rarely minted one-dollar coins, before the Civil War, the Spanish silver dollar was one of the main currencies in circulation in the United States. Many American official and private banks also use Spanish silver dollars as reserves, and most Americans convert paper money into Spanish silver dollars.
After the first US Treasury Secretary took office, the US currency adopted the "gold standard". By the outbreak of World War I in 19 14, the gold standard was disintegrated because countries stopped importing and exporting gold.
In the later period of the gold standard, the gold content of the US dollar was 1.50466 grams. 1934 65438+1October 3 1, and the gold content of one dollar is defined as 13.7 14 capsules (0.88867 1 g). The official price of gold rose from $20.67 to $35 an ounce.
By the time 1934 dollars depreciated, the US government gradually recovered all kinds of coupons before 1922. The depreciated dollar cannot be cashed, and only foreign central banks can exchange gold for the United States at official prices.
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The main scene pattern on the front of the US dollar bill is a person's head, and the main color is black. The main landscape pattern on the back is architecture, and the main color is green, but there is little difference between different versions, such as the back of 1934 is dark green, the back of 1950 is grass green, and the back of 1963 is dark green.
Because dollar green is an ink made of tree juice, the quality of tree juice is different every time, so the color is slightly different. The signature above is the signature of the finance minister, and different release years are different finance ministers.
Before the 20th century, 1, 5, 10, 25,50-cent banknotes were issued. Compared with the small front-page dollar, the big front-page dollar has increased by half. Interestingly, all denominations of dollars are the same size. At present, the US$ 20 is the most widely used high-value banknote in the United States, and the US$ 50 100 is very rare in the circulation market.
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