Read more: McDonald's Happy Meal Toys That Are Worth A Ton Of Money Die errors happen as part of the minting process of a coin. Coins are "struck" when a die, or metal cone, is heated to high ...

A coin expert has revealed how a number of commemorative Sir Isaac Newton 50p pieces have a minting error that could make ...

Double die mistakes occur when the metal on a coin gets struck multiple times by the die or design stamp on either the front (obverse), reverse, or both sides. Double die mistakes in mint or near ...

Comparing an erroneous coin side-by-side to a standard one, he flipped them over to reveal the Queen Elizabeth II bust and pointed out a "die clash ... This 50p coin is struck to Brilliant ...