A wrong planchet error occurs when a coin is struck on a blank intended for a different denomination or even a foreign coin. These are among the rarest and most valuable mint errors because each one is unique.
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Scan My CoinA Lincoln cent design struck on a smaller, lighter dime planchet.
How to check: The coin will be the size and weight of a dime (2.27g) but show the Lincoln cent design. Part of the design will be missing.
$200 - $2,000A quarter design struck on a nickel planchet, slightly smaller and lighter than normal.
How to check: Weigh the coin: normal quarter = 5.67g, nickel planchet = 5.00g. The design may be slightly compressed.
$500 - $3,000A dollar design struck on the smaller quarter planchet.
How to check: Dollar design on a coin the size and weight of a quarter. Much of the outer design will be missing.
$1,000 - $5,000+US dies striking a foreign coin blank that happened to be in the production line.
How to check: The coin will have unusual weight, size, or metal color for its denomination. The design may be complete or partial.
$500 - $5,000+Foreign planchets from previous production runs get stuck in machinery or bins and mix into the feed for a different denomination. Quality control sometimes misses them.
Values start at $200 for common denomination mismatches and can exceed $5,000 for dramatic combinations like dollars on dime planchets. Each is essentially unique.
Weigh and measure the coin carefully. The design should show full strike quality appropriate for the dies used. Upload to ErrorHunt for AI analysis.
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