Struck through coin fragment

Struck through coin fragment is a type of error that occurs when a flap of previously coined metal is not ejected from the beating chamber. Simultaneously, another planchet is inserted from the feed arm into the beating chamber, which is struck together with the coin fragment. As a result, the fragment detaches itself from the coin, creating a cavity containing the image of the flap minted in incuse and in an inverted position superimposed on the reliefs partially impressed by the coin.

This error belongs to the family of “partial brockage,” a topic that is discussed in the next sub-category, “struck through coin-brockage.” The rarity of this minting error is determined by the clarity of the incused and inverted drawings inside the cavity. The rarer and more expensive examples of this error are those in which the coin fragment escapes from the beating room immediately after the minting of the first coin, creating a unique and precious piece.

The first position is when the fragment is face up. In this case, the incuse design elements on the flap are normally oriented, meaning they are oriented in the same way as the design elements on the rest of the coin.

The second position is when the fragment is face down. In this case, the raised design elements on the flap are in a mirror image orientation, meaning they are reversed in comparison to the design elements on the rest of the coin.

The third position is when the fragment is held between the flange and the opposite die. In this case, the design elements on the fragment are in incuse with a mirror image of the opposite side. This means that the design elements are indented into the metal, and they are a reverse image of the design elements on the opposite side of the coin.