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Introduction To This Website
Introduction To This Website
Error-Variety Ready Reference
There are a number of excellent general references on minting errors and die varieties available to collectors. In the variety arena, The
C...
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Index Of Completed Entries
Index Of Completed Entries
Index entries are a mixture of higher-level and lower-level entries. Lower-level entries are often inserted into the index in alphabetical order and may therefore be separa...
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Blanking And Cutting Errors
Blanking And Cutting Errors
Blanking and Cutting Errors:
Definition: Any error that can be traced back to 1) the blanking press, 2) the shears, saw, or guillotine that trims the ends of the coin metal...
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Struck Through Dropped Filling
Struck Through Dropped Filling
Definition: This error type occurs when compacted die fill (“grease”) falls out of a recess in the die face and onto a planchet. The plug of hardened material is then...
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Part V. Planchet Errors:
Part V. Planchet Errors:
Poorly mixed alloy
Gas Bubbles (CW 11/19/12)
Intact (“occluded”)
Intrinsic metallic inclusions (ES Sept/Oct 2006; CW 12/27/10, 12/27/11, 7/21/14)
Lamination errors
Split p...
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Skidding Coin Errors
Skidding Coin Errors
Skidding Coin Errors
Definition: A weakly-struck coin that is pushed sideways while it is still loosely clamped between the dies. Affected design elements are smeared or complete...