Despite living in Pennsylvania for about two and a half years while in high school, I visited Philadelphia only once or twice ...

A “planchet” refers to the blank metal used to make coins. Planchet errors typically include clipped planchets that are the wrong shape or thickness, or planchets that were left blank.

Van Zeyl supplied an image of the planchet, seen to have the raised upset rim diagnostic to a planchet, which is the proper term for a blank after it has been run through the upset mill or rimmer. The ...