Part III. Die Installation Errors:

Two Anvil Dies:

Domestic

Definition: This error occurs when a planchet is struck by two identical dies bearing the anvil die design. There are several domestic examples, a unique two-tailed dime and 2-3 two-tailed quarters.  All these errors are thought to have been struck in 1965.

This Cu-Ni clad two-tailed Washington quarter is thought to have been struck in 1965. It is one of two known examples. There is another two-tailed quarter that is more likely to be a double-struck pseudo-mule.