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Before 1990, all US coin dies were subject to mint mark errors resulting from the preparation of the dies. The mint mark was hammered into the die manually sometimes causing a die to have a doubling. In the minting process this would create a series of coins with a distinct of slight doubling of the mint mark.
Jefferson nickels have been minted since 1938 at the Philadelphia and Denver mints and from the San Francisco mint until 1970. Key dates for the series include the 1939-D, and 1950-D nickels. The 1939-D nickel with a mintage of 3,514,000 coins is the second lowest behind the 1950-D nickel.
A well known example of a small mint mark is 1945-S "Micro S" U.S. Mercury dime, when the mint used an old puncheon intended for Philippines coins. [14] A much rarer example is the 1892-O "Micro O" U.S. Barber half dollar , which may have come about from the brief use of a mintmark puncheon intended for the quarter. [ 15 ]
Some of the rarest and most valuable coins in U.S. history owe their worth to minting errors that slipped through unnoticed. Coins like the 1943 Copper Penny, struck in copper instead of wartime ...
1984 Summer Olympics dollar [3] The pair of life-sized bronze nude statues of male and female athletes atop Olympic Gateway in the Los Angeles Memorial Coliseum: Eagle Ag 90%, Cu 10% Uncirculated: 217,954 P 116,675 D 116,675 S Proof: 1,801,210 S 1984 $10: 1984 Summer Olympics eagle [4] Olympic torch runners
With a metal such as nickel, which is harder than a normal coin metal like silver, gold or copper, the pressure must be greater. When a nickel coin, or any coin, is struck, the metal must "flow" into the contours of the front and back dies. It is through the atoms of the metal flowing into the dies that flow lines are created.
The Jefferson nickel has been the five-cent coin struck by the United States Mint since 1938, when it replaced the Buffalo nickel.From 1938 until 2004, the copper-nickel coin's obverse featured a profile depiction of Founding Father and third U.S. President Thomas Jefferson by artist Felix Schlag; the obverse design used in 2005 was also in profile, though by Joe Fitzgerald.
In the hope of making them easy to sort out and withdraw after the war, the Mint struck all "war nickels" with a large mint mark appearing above Monticello. The mint mark P for Philadelphia was the first time that mint's mark had appeared on a U.S. coin. [91] The pre-war composition returned in 1946; all nickels struck since then have been in ...