PART V. Planchet Errors:

Irregular Planchets:

Scraps / Fragments:

Off-metal

Definition: Occasionally fragments of metal are struck that have a composition different from the coin whose design it carries.  Sometimes the composition of these fragments matches those of another denomination.  In other cases the composition is quite exotic.

This undated Roosevelt dime has been struck on a piece of copper scrap metal.

Images are courtesy of Heritage Auctions.