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Doubled die (also known as hub doubling) is a term in numismatics used to refer to a duplication of design elements on a working die created due to a misalignment of the die or hub during the hubbing process. Strength of the doubling can vary from very slight and isolated to extreme and widespread.
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).
A doubled die occurs when a die receives an additional, misaligned impression from the hub. Overdate coins such as the 1942/1 U.S. Mercury dime and 1918/7 U.S. buffalo nickel are also doubled dies. They are both listed by CONECA as class III doubled dies. [4] Class III means the die was hubbed with different "designs" (or hubs that had ...
The 1972 Doubled Die cent is worth a pretty penny,” said Pearlman, sharing that the Numismatic Guaranty Company Price Guide “estimates the current retail value at $175 in Extremely Fine ...
A "1955 doubled die Denver mint penny" is a plot device in the American movie UHF; when R. J. Fletcher cruelly gives a penny to a beggar, the beggar realizes its value and uses the money earned from trading it in to save a local TV station that Fletcher was hoping to buy out. Although the Denver mint did produce some doubled die pennies in 1955 ...
However, it too wears the dies when they are used for too long. An infamous example is the 1955 "poorman’s double die." This coin is sold as a replacement for the 1955 doubled die cent, but it is no more than Die Deterioration Doubling, caused by wear on the dies. When a coin is struck, the planchet is not heated. Although the planchet would ...
The die that was on the hammer side, usually the reverse (back), [1] tended to wear out first. [2] The planchets were usually hot prior to striking. [ 2 ] On some Roman provincial coins , some believe the tongs used to move the heated planchet left permanent center indentations on the finished coins.
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