When a crack forms in the die used to strike the coin, metal flows into this void, creating a raised blob of metal known as a "cud. Other planchet errors include "clips," where excess metal is not fully removed from the blank, resulting in an irregular edge, or "wrong planchet" errors, where a coin is struck on a planchet intended for a different denomination or year.
Sacagawea Gold Dollar Struck Through Errors: Understanding Die Cuds and Planchet Mistakes
This often results in a ghostly image or significant doubling of the design details. The Mechanics of Minting: How Errors Occur The creation of a coin is a high-speed industrial process, and when machinery fails or variables shift, errors inevitably emerge.
A "broadstrike" occurs when the coin is not properly seated, causing the planchet to spread outward and strike the collar ring, resulting in a larger, thinner coin with weak or missing edge lettering. " Conversely, a "die break" results in missing design elements where the metal fails to fill the void.
Sacagawea Gold Dollar Struck Through Errors: Understanding Die Cuds and Planchet Mistakes
A double strike happens when a coin is fed through the press twice, causing the second impression to overlay the first. Double Strikes and Overstrikes Another fascinating category includes double strikes and overstrikes.
More About Sacagawea gold dollar errors
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