Minting coins isn't exactly an exact science. Even though most coins are perfect and uniform, small mistakes can result in error coins that are super valuable and ...

2. The Missing Mint Mark Next on our list is the missing mint mark. Most coins have a little letter indicating where they were produced-like a secret handshake between coin enthusiasts. If a coin ...

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 ...

These days you’d be hard-pressed to find a single item available at a store for a nickel. So you can be forgiven if you toss your 5-cent coins into a jar or car cup holder along with your unwanted ...