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Wrong die or mule The coin error type of Wrong die or mule is a striking error that is commonly caused by an incorrect installation of the dies on the money press. This error occurs when a worker installs a pair of mismatched dies and activates the monetary press, resulting in the production of the…

Weak strike In the production of coins, a strong pressure of 35 to 200 tons is required for the upper die to transfer the design elements onto the planchet. The pressure required varies according to the denomination of the coin, the alloy used for production, and whether it is intended for circulation or testing purposes.…

Struck through planchet Struck through planchets is a type of coin error that occurs when two planchets are mistakenly fed into the beating chamber at the same time while the press is in operation. The overlap can be total or partial, and the affected area always presents a difference in height, resulting in a classic…

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…

Wrong planchet Wrong planchet is a type of striking error that includes all coins that have been minted on objects other than those intended by the characteristics of the issue decree. An object refers to any physical thing that could end up in the beating chamber during the minting process for any reason. An example…

Partial collar The coin error type known as “partial collar” is similar to broad typing in that it results from a malfunction of the monetary press during the minting process. During the minting process, three elements come into action simultaneously: the upper die, the lower die, and the collar.As previously discussed in the sub-category of…

Double or multiple strike Off-center strike is a type of coin error that occurs when a coin is struck off-center, resulting in an incomplete or partial design. This error can also occur with double or multiple strikes when a coin is struck two or more times before being ejected from the beating chamber. Coins with…