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Type of Error Coins-Planchet

Planchet errors

Planchet errors occur when the wrong coin blanks, or planchets, are fed into a coin-stamping press. This results in a coin that has been stamped with a design intended for a differently sized coin; this is called a wrong planchet error. In addition, unminted or blank planchets are occasionally produced. The results are usually obvious errors that are also prized by collectors, though the errors are usually caught in manufacturing and destroyed. Blank planchets with rims are valued lower than those with no rim.

A Kennedy half dollar struck on a Susan B. Anthony planchet is extremely rare. Sacagawea dollars exist with a state quarter design on the back; this type of error is called a mule, and unintentional ones are rare.

Occasionally a misfeed can occur where a strip isn’t fed through far enough. When this happens, the punches strike an area of the strip which overlaps the hole left by the previous strike. The result is a blank with a piece missing. A clipped planchet is straight, curved, ragged, incomplete, or elliptical.

A wrong planchet occurs when a denomination is struck on a planchet of a different denomination. Some examples include cents struck on dime planchets, nickels on cent planchets, or quarters on dime planchets. Sacagawea dollars have been reported with statehood quarter designs on the reverse. A much rarer error is a U.S denomination struck on a foreign planchet (17th,18th, and 19th centuries only).

(Source: Wikedpedia)

I appreciated Coin Worlds’ explanation and deeper look at the types of plancet errors. The pictures are very clear.

Here is an example of an error coin on Ebay. It is a quarter on a nickel planchet.

Tags: planchet