Struck trough planchet
This type of error 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 including the classic round shape, flat and devoid of design elements (as opposed to brockage).
In very rare cases, a coin previously involved in another type of striking error will not be pulled out correctly by the ejection mechanism. Simultaneously, a new planchet is inserted from the feeding arm which will be struck together with the non-ejected coin.
At the time of minting, the non-minted planchet delete (partially or totally) the reliefs of the coin not ejected and subsequently involved in the overlap (E.B.36).
Coins with this type of error are easily intercepted by quality controls and therefore it is assumed that the appearance on the market of certain specimens occurs at the hands of some worker who illegally transported them outside the Mint.
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