Numismatic Dictionary

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There are 36 names in this directory containing the search term planchet. Clear results.
A flat disk of metal destined to be made into a coin. See also planchet.

blanking die
A die used to cut coining blanks from pieces of prepared metal. See also planchet.

blanking press
The press that uses blanking dies to punch blanks from prepared metal See also planchet.

Bowtie Clip Error
A type of error coin that was punched on a scrap of metal punched from the webbing created when blanks are punched from the metal sheets. The scrap was punched from the web-like sheets and the resulting scrap resembles a bowtie. The scrap is mixed with the other planchets and is punched with the working dies.

Civil War Tokens
Tokens issued during the Civil War that were usable in place of scarce coins. Most Civil War Tokens were struck on copper planchets but some later tokens were struck on brass, silver, and other white metals. Many of the tokens were designed to look similar to United States coins and most included political messages.

clashed dies
Extraneous design detail often appears on a die as a result of two dies coming together without a planchet between them during the minting process.

Term used for a coin struck from a clipped planchet.

clipped planchet
Term used to describe a planchet that may have been cut incorrectly from the metal sheet. The clipped area may be curved if cut into the area where another planchet was cut out or straight if cut beyond the edge of the metal strip.

coin blank
Another term for planchet.

The manufacturing of coins made by stamping planchets under pressure between dies.

A form of planchet flaw caused by imperfections in the metal whereby a thin strip of the metal separates itself from the coin.

A cylindrical piece of metal containing an incuse image of a coin design that imparts a raised image when stamped into a planchet on a coining press.

die clash
This occurs when the dies collied with each other when a planchet fails to be fed into the coining press. The force of the strike can make impressions of the oposite designs on the dies. The subsequent coins will include those images know as clash marks. See also clash marks.

feeder finger
A part of the coining machine that feeds the planchet into the striking chamber. Occasionally, feeder fingers have broken free and struck by the dies. This is rare type of error coin.

flow lines
Visible lines on a coin that was the result from the metal flowing outward from the center of a planchet as it is struck. See also cartwheel.

A piece of die steel showing the coinage devices in relief, or raised, as they are on a coin. The hub is pressed into the blank die, resulting in an incused, mirror image on the die. The die is then pressed into a planchet, or coin blank, on a coining press, to produce a coin. See also error.

Lamination is a type of error in the planchet that occurs when a thin layer of the metal splits or peels away from the surface of the coin. See also planchet flaw.

lint mark
A small, thin, irregular depression on a coin’s surface caused by a piece of lint adhering to the die or planchet during the minting process.

Metal stress lines
Radial lines, sometimes visible, caused by metal flowing outward from the center of the planchet during the minting process. See also flow lines or cartwheel.

missing clad layer
A type of error that occurs when part of the metal of a clad coin separates from the planchet.

off metal
A type of error that occurs when a coin is struck on a planchet that it is not normally struck, such as striking of a quarter on a planchet that was supposed to be for a nickel.

open collar
A device used to position a planchet over the lower die. It was employed specifically for striking early U.S. coins whose edges had already been stamped with reeding or lettering.

Partial Collar Strike
A type of striking error where a planchet does not enter completely into coining position and is struck partly within the collar and partly outside. See also collar.

A grayish soft metal made of 85-95 percent tin. For coin making, the balance of the alloy is usually copper but lead has been used in some poorer countries. When used as a coinage metal, the planchets are small to prevent bending. Pewter is not used in the United States.

In French is written as “piefort,” is a coin struck on a planchet that is thicker than circulating coins.

A flat disk of metal destined to be made into a coin. See also blank.

planchet defect
Any defect of a coin that was caused by the planchet being imperfect prior to the coin being struck. See also planchet flaw.

planchet flaw
An irregular hole in a coin blank sometimes the result of a lamination that has broken away. See also lamination.

planchet striations
Fine, incuse lines found on some Proof coins potentially caused by polishing of the blanks prior to striking.

The process of striking a special version of a coin with higher quality dies and specially polished planchets.

Name given to an experimental four-dollar goloid coins struck by the U.S. Mint in 1879-1880. The Stella was struck using a planchet whose alloy was 6.00g Au, 0.30g Ag, and 0.70g Cu while the United States was considering joining the Latin Monetary Union (LMU), the forerunner to the Eurozone. Congress rejected the proposal to join the LMU and the Stella program ended.

The flattened sheet of metal from which blank planchets are punched.

struck through errors
These are errors that are seen on coins that were the result of debris or other foreign matter that entered the striking chamber of the coining press. The most common struck trough errors is when grease that is used to preserve the dies during the striking process is applied too heavily and prevents the dies from making a strong impression on the planchet.

struck-on error
A type of error that occurs when a coin is struck on a different planchet than it was supposed to appear. See also off metal.

A type of brass whose alloy consists of 85-percent brass and 15-percent zinc giving it a yellowish color. In 1942 and 1943 Canadian 5 cent coins were struck using planchets made of tombac.

An inexpensive silvery metal that is used as part of an alloy to make planchets. The 1943 Steel Cent was made from zinc-coated steel. Lincoln cents made since 1982 are copper-coated zinc coins. Its chemical symbol is Zn.

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