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Printable version; In other projects ... Pages in category "Mint-made errors" ... 0–9. 1955 doubled die cent; 2000 Sacagawea dollar – Washington quarter mule; B.
Due to improvements in production and inspection, modern errors are more rare and this impacts value. [3] Some types of errors, such as clipped planchets, edge strikes, and foreign object strike-throughs can be faked. Many errors are sold ungraded because of their relatively low value and the relative cost of grading.
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.
The following mint marks indicate which mint the coin was made at ... Doubled die errors are known. [4] D 7,189,600 S ... Commons Attribution-ShareAlike 4.0 ...
The following mint marks indicate which mint the coin was made at: P ... Extra leaf errors are known. [3] [4] S ... Commons Attribution-ShareAlike 4.0 ...
The following mint marks indicate which mint the coin was made at (parentheses indicate a lack of a mint mark): P = Philadelphia Mint. D = Denver Mint. S = San Francisco Mint. W = West Point Mint. O = New Orleans Mint. CC = Carson City Mint
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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.