PART VI. Striking Errors:
Unstruck Planchet (“Type II Planchet”)
Definition: A metal disk or blank that has passed through the upset mill . This process smooths the edge of the blank and produces a low proto-rim.
Most unstruck planchets result from complete planchet misfeeds. The feeder mechanism malfunctions so that the planchet is either not pushed into the striking chamber or it is pushed beyond the striking chamber.
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The image below left is a silver planchet that was intended to be struck by quarter dollar dies.
The image below right is a clad planchet that was intended for use as an Eisenhower dollar.
Images are courtesy of Heritage Auctions.