To clarify and narrow down the type of error I mean, using a nickel as an example, I mean a nickel struck on a planchet for say a penny, but is of the same size as a nickel. So, it would be an off-metal error in which the wrong metal sheets were loaded to make the nickel planchets, and the coins were subsequently struck with that wrong metal. Otherwise, everything about that coin is the same as any other nickel. Are there any examples of this error? Thanks in advance!
There are a FEW buffalo nickels struck on copper planchets of the proper size but they are probably die trials. Back on the 19th century patterns or pieces de caprice struck on correct size but differnt metal composition are well known. There are also a few coins struck on foreign planchets that are of the proper size but wrong composition. About the only true wrong metal errors in US coins are transitional pieces such as the 1943 copper cent, the 1944 steel cent, a few 1946 nickels on war nickel planchets, the 1964 dimes and quarters on clad planchets, 196 dime and quarters on silver planchets. There are also the 1974 D and 1977 D halves and dollars on 40% silver planchets, and there are two 1973 S business strike dollars on coppernickel clad planchets.
