Sometimes planchets for one coin denomination are fed into a coin-stamping press equipped with dies of another denomination. This results in a coin that has been stamped with a design intended for a ...

Some of the rarest and most valuable coins in U.S. history owe their worth to minting errors that slipped through unnoticed. Coins like the 1943 Copper Penny, struck in copper instead of wartime steel ...

6. The Proof Coin Pops Finally, we have the proof coin errors. Proof coins are typically struck for collectors, and they usually have a mirror-like finish. But sometimes, these coins can have ...

The 2018, which features Queen Elizabeth II on the front and the Nations of the Crown design on the reverse, was minted with an error ...