Mint-made errors
type of error in a monetary coin
Mint-made errors occur when coins are made incorrectly at the mint, including anything that happens to the coin up until the completion of the minting process. Mint error coins can be the result of deterioration of the minting equipment, accidents or malfunctions during the minting process, or interventions by mint personnel. Coins are inspected during production and errors are typically caught. However, some are inadvertently released into circulation. Modern production methods eliminate many errors, and automated counters are effective at removing error coins. Damage occurring later (post-mint damage (PMD)) may sometimes resemble true mint errors. Error coins may be of value to collectors, depending on the rarity and condition. Some coin collectors specialize in error coins.
Errors can be the result of defective planchets, defective dies or the result of mistakes made during striking. The planchet, die, and striking (or PDS) classification system happens to correspond with the mintmarks of the three largest U.S. mints, Philadelphia, Denver, and San Francisco.
“Mint-made errors” enters the record as type of error in a monetary coin. Crown Archives preserves that source wording while asking what Mint-made, errors and type can confirm, complicate or overturn.
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