Baker Numismatics «
http://www.bakercoins.net/learn/images/ | | Photographic image library of coins with doubled dies , repunched mintmarks , over mintmarks , and repunched dates. |
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. |
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. |
