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.

Anthony dollar's value is a clear example of that. This odd gold-toned coin happened when the planchet (or coin blank) for a Sacagawea dollar was fed into the coin press with the dies for the 1999 ...