Baker Numismatics - http://www.bakercoins.net/learn/images/
Photographic image library of coins with doubled dies, repunched mintmarks, over mintmarks, and repunched dates. |
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. |
Combined Organizations of Numismatic Error Collectors of America - http://conecaonline.org/
National numismatic organization devoted to error and variety collectors. |
Error Coins Magazine - http://www.etcmmag.com/
Monthly magazine devoted to error coin collecting. Available by subscription. |
Error World - http://www.surok.addr.com/
Internet club devoted to error and variety coinage of all kinds. |
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. |
Jason's Error Coins - http://www.error-coins.com/
Images of a collection of error coins. Wheat cents, Mercury dimes and other assorted. |
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. |
Rotated Die Coin Census - http://www.rotateddies.com/
Census for US coins with major die rotation of 90 degrees to 180 degrees. Includes fake error detection and measurement indices. |
Silver Dollar VAMs - http://www.robjoyce.com/vams
Detailed information on silver dollars, specifically Morgan and Peace Dollar die varieties known as VAMs. |