Errors increase the value of collectibles because a limited number go into circulation before it is spotted and corrected.

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 ...

The 1990 penny error coins represent some of the most exciting finds for modern coin collectors. This year marked a significant transition in U.S. Mint production ...

Rare coins worth thousands really do slip through everyday wallets, so it pays to check your change before spending it. I focus here on specific dates, mint marks and errors that experts flag as ...

If you have any spare change lying around, it’s worth checking if any of them are faulty, as a rare error coin could be worth hundreds of pounds. On 9 May, a rare ...