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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).
Doubled die varieties, when noticeable to the naked eye or occur in a popular coin series, are extremely popular with collectors and can be worth a large premium over the same coin without the doubling. The most popular doubled die variety would be the 1955 US cent doubled die [1] which typically sells for over $1000 at auction. [2]
Those 1955 Doubled Die Obverse Lincoln cents are now one of the most sought-after varieties in coin collecting,” Lang wrote. ... these mistakenly-made pennies have a retail value ranging from ...
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 ...
Eagle reverse, 1932–1964 (Silver) Year Mint Mintage [1] [2] Comments 1932 (P) 5,404,000 D 436,800 S 408,000 1934 (P) 31,912,052 Doubled die errors are known.
The mint mark on the coin is currently located on the obverse at the bottom right hemisphere under the supposed date. In 1965–1967 cupro-nickel coins bore no mint mark; quarters minted in 1968–1979 were stamped with a "D" for the Denver mint, an "S" for the San Francisco mint (proof coins only), or blank for Philadelphia.
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 obverse was slightly changed in 1974, with some details sharpened. [38] Mint marks on post-1967 pieces are found on the lower right of the obverse, to the right of Washington's neck. [39] Beginning in 1976, and continuing over the following twenty years, Mint engravers modified the design a number of times. [40]