Double- And Multiple-Struck Coins

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Obverse of Sacagawea Dollar - Struck 18 Times Reverse of Sacagawea Dollar - Struck 18 Times

DOUBLE- AND MULTIPLE-STRUCK COINS

When a blank planchet is struck by the dies, the normal procedure is for the feeders to eject the struck coin out of the collar and into a chute. If there is a malfunction and the struck coin isn't ejected, it may receive a second or third strike by the dies. A multiple struck coin can happen in many ways and have many combinations of errors.

Images courtesy of Byers Numismatic Corp

Significant examples:
Sacagawea $1 Struck 18X in an ANACS holder (illustrated above).

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