Real 1943 copper ... the Badger State. Of the 453 million Wisconsin quarters minted in 2004, thousands were somehow marked with an extra leaf on a husk of corn; some speculate a Mint employee ...
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 ...