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Israel Error Coins - http://www.geocities.com/israelerrorcoins/
The site focuses on Israeli error coins but also features Canadian, U.S. and others. See bi-metallic errors, coins struck on scrap metal, and others. |
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Combined Organizations of Numismatic Error Collectors of America - http://conecaonline.org/
National numismatic organization devoted to error and variety collectors. |
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Collecting Error Coins - http://studium.com/6/errorcoins.html
Just as nearly every family has its black sheep, virtually every coin series has its failures. These are known as errors or mis-struck coins, and have a following all their own. |
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Mint Error News Magazine - http://minterrornews.com/
Available both as a print magazine and an online PDF magazine with articles, features, and discoveries of major mint errors (striking errors) from the United States and around the world. |
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World Error Coins - http://www.worlderrors.com/
Describes and illustrates dramatically mis-struck foreign coins. Includes information on recognizing various types of error coins as well as articles on how to get started collecting them. |