US coin that feature a president image twice?
Take any penny minted in 1959 or later. Look closely inside the Lincoln Memorial. A very strong magnifying glass may help.
Among current-issue coins, only the Native American (Sacajawea) dollars don't depict a US president. Older issues include the Susan B. Anthony dollar and Ben Franklin half dollar. Before that, most coins showed a stylized portrait of Miss Liberty, or in some cases an emblematic image, such as that on the Shield Nickel.
There were no gold $1 coins issued by the US Mint in 2004. The only dollar coins in production at this time are the Presidential Dollars and the Native American Dollars. Both are made of brass which contains 88.5% copper, 6% zinc, 3.5% manganese and 2% nickel. This alloy gives them a golden hue but they are still just brass and will tarnish in circulation. The Native American Dollars use the Sacagawea obverse but feature…
A "Doubled Die" error on a coin is the result of a fault in the die manufacturing process creating either a fully complete image at an angle to the original or, most commonly, what might appear as a blurred image on the coin such as you may get if you move a camera at the point of taking the photo. Such dies should never reach the point of striking a coin. The term "Doubled Die"…
That depends on which dollar coin. Anything up through 1935 had some version of Lady Liberty. Then the large dollars in the 1970s have President Eisenhower. The small dollars minted 1979-81 and 1999 show Susan B. Anthony. Golden dollars starting in 2000 feature Sacagawea. Then in 2007, the Presidential dollar coin series started, with four designs per year, one for each President. As of 2012, those show George Washington up through Grover Cleveland.
There is no British 10 Pence coin designed with the Queen's head on both sides. It is most likely a trick coin available from magic shops. In the extremely unlikely event that a "double header" coin was minted, one side would have a raised image as usual, the other side would have the image indented or incuse.