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 ...

Discover 12 coins from the 1940s worth far more than face value. Learn how these hidden treasures could help you earn extra ...

When that coin crossed the auction block, it realized $15,862.50, a figure that has since become shorthand among collectors for how extreme mint errors can rewrite the value of a modern quarter. The ...

Loose change might seem worthless in today's digital payment world. Most people barely glance at the coins jingling in their ...

A rare 20p coin has sold for almost 200 times its face value after a subtle minting error sent its price soaring – and the ...

An overflowing change jar is a sign that your coins need a new home. This can mean moving your spare quarters and dimes to a bigger jar; or, even better, checking to see if you have any valuable coins ...

An unknown number of new George Washington dollar coins were mistakenly struck without their edge inscriptions, including “In God We Trust,” and are fetching around $50 apiece online. The properly ...

The 20p piece, which features Queen Elizabeth II on the front and the Royal Shield of Arms on the reverse, was minted with a ...

It looks like the U.S. Mint has struck again -- or actually, not struck again. Some of the new dollar coins featuring John Adams are missing edge inscriptions including "In God We Trust," according to ...