Brockage

A brockage error coin is a coin that has been struck not by the die but a coin that has accidentally adhered to the die. When a coin is made, a blank planchet is fed into the punch. An engraved die is then pressed into the blank planchet leaving the design on the face of the coin. Sometimes a coin will stick to the die after it has been struck. The next coin in line is then struck with the coin stuck to the die instead of the actual die, leaving a negative impression on the blank planchet. Brockage errors with the full coin's detail of worth the most.