During World War II, the U.S. Mint switched to zinc-coated steel pennies to conserve copper for military use. However, a small number of 1943 pennies were mistakenly struck in copper ...
A second 1982-D Small Date homogenous copper alloy Lincoln cent has been discovered ... Any surviving 1982-D Small Date bronze cents are transitional alloy errors, cousins to the famous 1943 bronze ...
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