error coin

noun

, Numismatics.

1. a coin showing evidence of a mistake in its manufacture.

Example Sentences

"This is the most famous error coin in American numismatics and that’s what makes this so exciting: No one really knows what it’s going to sell for," Miller said in comments obtained by SWNS.

From Fox News

This error coin coming to auction in January in Tampa, Florida, is one of the more bizarre errors to come to public attention.

From Washington Times

This error coin coming to auction in January in Tampa, Florida, is one of the more bizarre errors to come to public attention.

From US News