Struck through coin - Brockage

The coin error known as “Struck Through Coin – Brockage” occurs when a newly minted coin remains attached to the upper or lower die during the striking phase. This results in another planchet being introduced into the beating chamber, which is then struck together with the previously trapped coin. In certain circumstances, the trapped coin assumes the role of the die and imprints its image in incuse and in an inverted position on one side of the coin. The opposite side of the coin then receives the imprint in relief and in a regular position.

When the trapped coin only compromises a part of the die, this error is referred to as “partial brockage”. In this case, the coin will have the imprint in part in relief and in a regular position, and in part in incuse and in an inverted position. However, when the trapped coin compromises the entire surface of the die, this error is designated as “full brockage”.

It is important to note that coins with a “cap” deformation, where the trapped coin encapsulates the surface of the die, are extremely rare to find. This can occur when workers illegally export such specimens from the Mint for profit. If you come across a coin with this error, it is considered a valuable and rare find.