Part IV. Die Errors:

Collar Clash:

Anvil Die Collar Clash:

Traditional die setup

Definition: Collar clash on the reverse die, with the reverse die acting as the anvil die.

Collar clash is virtually unknown on reverse dies installed in the traditional fashion, i.e., with the reverse die acting as the anvil die. Anvil die collar clash can develop if the neck of the die is shoved violently into the ridged working face of the collar or vice versa. Anvil die collar clash can also develop if the neck of the collar grinds up and down against the collar (or vice versa).

This undated, off-center dime shows anvil die collar clash on its reverse face. Because the coin was struck out-of-collar, the familiar serrations of collar clash have been transformed into a series of transverse grooves located within the coin’s slide zone. This dime also displays three indentations in its edge, which represent pre-strike planchet damage.