Glossary

Categories

Bonded Coins
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Broadstrikes
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Brockages
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Counterbrockages
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Die Adjustment Strikes
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Die Caps
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Die Trials
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Double Denomination
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Double/Multiple Strikes
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Dual Countries
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Essay Trial Strikes
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Experimental Blanks
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Experimental Strikes
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Experimental Surface
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Feeder Finger Strikes
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Foreign Coins Struck
on U.S. Planchets

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Galvanos
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Gold Die Trials
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Gold Errors
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Gold Off-Metals
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Hub Trials
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Indents
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Intentional Errors
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Martha Washington
Test Pieces

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Mated Pairs
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Mules
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Multiple Errors
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Off-Centers
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Off-Metals
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Overstrikes
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Pattern Die Trials
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Pattern Errors
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Pattern Mules
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Plaster Models
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Platinum Errors
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Proof Errors
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SMS Mint Errors
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Specimens
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Spectacular Errors
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Struck Scrap
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Struck Thru
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Transitional Errors
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Two-Headed Coins
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Two-Tailed Coins
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Uncanceled Dies
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Uniface Die Trials
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Unique Coins


slabblankslab

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.

Major mint errors on U.S. gold coins are extremely rare. There are only a few known that are double or triple struck. One phenomenal example is this double stuck 1904 $20 rotated 180 degrees in the collar. Considerable detail remains from the initial strike and is visible under the portrait on the obverse and the eagle on the reverse. This exciting mint error was in my personal collection and has been authenticated and certified by NGC and BYERS COLLECTION is noted on the insert.