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Blanks are surrounded by collars when struck to prevent the blank from flattening and spreading. Edge and rim errors occur when collars are either out of position or are deteriorated. A wire rim occurs when excessive pressure squeezes out metal between the collar and the edge of the die producing an extremely high thin rim.
The over mint mark is created when a one date and mint mark is punched over another date, part of a date, or mint mark. These coins are generally restricted to the early minting process of coins dating before the turn of the century. The DDO and DDR errors are related to any part of the coin that shows a distinct doubling.
Printable version; In other projects ... The following mint marks indicate which mint the coin was made at: P = Philadelphia Mint. ... Extra leaf errors are known. [3 ...
The use of screw presses drastically reduced the amount of brockages which escaped the mint from the mid 16th-century onwards, but as high speed machinery became more common in the 19th century, more brockages appear. It is known that some unscrupulous mint workers have created brockages in the past simply in order to sell to coin collectors.
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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.