Error coins are a fascinating aspect of numismatics, with each one telling a unique story of a mistake made during the coin manufacturing process. These coins can exhibit a variety of issues, from being struck off-center to having the wrong planchet type or thickness.
One common cause of error
coins is damage to the coin die, which can result in multiple coins being
produced with the same error. Whether the die is cracked from overuse or was
not made correctly in the first place, these mistakes can lead to a range of
interesting and valuable error coins entering circulation.
Classification of Error
Coins
There are three different
classifications of error coins. Some error coins may have a combination of
these problems.
Die:
A coin die is a hardened piece of metal that is used to strike the coins in the coining press. Any coin die that is not made in adherence to Mint standards. This may include preproduction errors and damage to the coin die during the coining process.
Planchet:
Any problem with the planchet that the coin was
made on. This may include incomplete planchet, wrong metal, cracked, chipped,
clipped, or thickness.
Strike:
Any problem with the physical production of the coin in the
coining press. There is numerous classifications of errors that are due to the
improper striking of a coin. Examples include off-center strikes, multiple
strikes, rotated dies, misaligned dies, weak strikes, overstrikes, etc.
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