planchet flaws

См. также в других словарях:

• Mint-made errors — are errors in a coin made by the mint during the minting process. Mint error coins can be the result of deterioration of the minting equipment, accidents or malfunctions during the minting process, or intentional interventions by mint… …   Wikipedia

• Common coin errors — An error coin is a coin that is minted abnormally. Many different types of errors can occur during the minting process. The following are some of the most common error types. Numismatic value of error coinsMost error coins demand a premium when… …   Wikipedia