Quote:Part IV. Die Errors:
Die Damage:
Peripheral Die Damage:
Die Attrition Error
Definition: This is the most recognizable and regular form of peripheral die damage. A die attrition error is generated when a temporarily misaligned hammer die smacks repeatedly against the beveled entrance of the collar. This wears away the edge of the field portion of the die and sometimes the entire rim gutter. This leaves the coin with an unstruck, raised crescent on the face struck by the hammer die. The internal margin of the crescent is smooth. Particularly severe die attrition errors can leave peripheral letters significantly truncated.
Die attrition errors are especially abundant among 1983 cents. A die attrition error
will only be detected after the hammer die has returned to center.
Die attrition errors are sometimes mistaken for
Cuds (marginal die breaks) and sometimes confused with other, more erratic forms of peripheral die damage and die loss.