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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.
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 ]
The 8 mint marks used to distinguish coins not minted in Philadelphia (in the chronological order of their first coinage) are: D for the Dahlonega Mint (production of coins started on February 12, 1838), C for the Charlotte Mint (March 27, 1838), O for the New Orleans Mint (May 8, 1838), S for the San Francisco Mint (April 3, 1854), CC for the ...
1967 Kennedy Half Dollar. ... This rare coin is notable because it doesn’t contain a mint mark; the U.S. Mint deliberately didn’t include mint marks on coins produced from 1965 to 1967, to ...
The Red Book lists the retail price of all United States coins from colonial issues to modern circulating U.S. coins, including each year of issue, mint marks, and significant design variations. In addition, the Red Book lists commemorative coins , mint sets and proof sets , and bullion coins , as well as significant U.S. pattern coins ...
The Library of Congress eagle of 2000 was the first bi-metallic coin issued by the US Mint. [11] Later that year, the mint released a 1,000 Icelandic króna coin commemorating the 1,000th anniversary of Leif Ericson's discovery of the Americas. This coin was struck on the same planchet as the silver dollar that also commemorated the event. [12]
The Quarter-Dollar, Half-Dollar and Dollar coins were issued in the copper 91.67% nickel 8.33% composition for general circulation and the Government issued six-coin Proof Set. A special three-coin set of 40% silver coins were also issued by the U.S. Mint in both Uncirculated and Proof.
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