Home > Recreation > Collecting > Coins > Error Coins
Error coins are those coins which during the manufacturing process were improperly formed or stamped. These coins include but are not limited to double dies, cuds, mules, wrong planchet or material errors. Sites in this category provide information about collecting, identifying and authentication of error coins.
http://conecaonline.org/
National numismatic organization devoted to error and variety collectors.
Home > Recreation > Collecting > Coins > Error Coins
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