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A copper shortage during World War II prompted the U.S. Mint to switch the one-cent penny to a steel composition that was coated in zinc, according to Gainesville Coins.
Doubled die coins are mainly created by a defective hub which is used to create many dies for the minting process. Collectors classify doubled dies as DDO (doubled die obverse coins), DDR (doubled die reverse) and OMM (over mint mark). The over mint mark is created when a one date and mint mark is punched over another date, part of a date, or ...
Coins like the 1943 Copper Penny, struck in copper instead of wartime steel, or the 1955 Doubled Die Penny, with a striking double image, are worth thousands — or even millions — due to these ...
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 ]
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.
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
Then, starting the next year, through 1967, all mints produced coins without mint marks, as a shortage of coins was blamed on coin collectors. [6] No proof sets or uncirculated mint sets were produced by the mint in those years, and instead "Special Mint Sets" containing circulation coins featuring a satin finish were sold to collectors ...
In modern presses, a die strikes approximately 120 coins a minute. This is a large number of coins produced in a short time, and obviously the die cannot last forever. However, the process of wearing the die is only hastened by the metals used in coins. Nickel, one of the main metals used in today’s coins, is quite hard and causes wear ...