1942 mercury dime double die

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However, some are inadvertently released into circulation. Coins are inspected during production and errors are typically caught. 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. 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.

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