7 Rare and Valuable Coins Hiding in Plain Sight 

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January 24, 2013, Stack's Bowers Galleries auctioned this Green-Contursi-Cardinal for $8.5 million in NYC. One-coin sales record. How did this dollar peak? Federal dollar coin #1. The Bank of America made copper trials and coins for two years after its founding in 1792. The first Flowing Hair silver dollar was made in 1794.

1. One Flowing Hair dollar, silver, 1794

This Damascus dinar was coined in 723. This coin's gold may have come from a Caliph mine. The 2011 Blanchard and Company sale netted nearly $6 million. This dinar is one of the rarest and most valuable coins.

2. A Gold Umayyad dinar, 723

As mentioned, the US central bank did not exist in the 18th century. Thus, individual entrepreneurs created currencies. Ephraim Brasher struck this New York doubloon in 1787. Spanish currency ruled the market, and this coin rivaled Lima doubloons.

3. Gold Brasher Doubloon, 1787

America manufactured gold twenty-dollar coins from 1907 to 1933, when it stopped. The year before Roosevelt issued Executive Order 6102 on April 5, 500,000 twenty-dollar coins were produced. Under the New Deal, private gold was handed to the government for melting. Some coins cooled. Egyptian King Farouk had one. It sold for $7.5 million at Sotheby's July 30, 2002.

4. Double Eagle Twenty Dollars, Gold, 1933

This coin is called “the king of American dollars” for its genuineness. Despite its 1804 date, it was coined in 1834. No silver dollars were available that year, thus it was made as a diplomatic present for sovereigns. One coin went to the King of Siam, Sultan of Muscat, and Emperors of Japan and Cochinchina.

5. 1804 silver dollar with draped bust

The Royal Canadian Mint issued the first million-dollar coin in 2007. The coin promoted the new Royal Canadian Gold Maple Leaf series. The coin is 50 cm wide and 3 cm thick and constructed of 100 kg of 99.999% pure Troy gold. This coin sold for $4 million at Vienna's 2010 public auction.

6. One Million Canadian Gold Dollars, 2007

France's rarest modern coin is 68% silver. Twenty Turin twenty-franc coins were tested in 1932. Two were embedded in Pont-Arcy Church and Aix-les-Bains Thermal Baths' foundation stones. Another was graded by Monnaie de Paris expert Alain Weil in 1991. 

7. Turin Twenty Francs, 1932

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