You've Got To Know This Or You're Messing Up Big Time! You need these websites and resources before you search for mint error coins, doubled die coins, die varieties, rpms, repunched mint marks or anything different about your coin, including anomalies.
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Mint error guide
Mint error video guides    • Mint Error Coins  
CONECA https://conecaonline.org/
Variety Vista http://www.varietyvista.com/
Wexlers doubled dies https://doubleddie.com/58201.html
Jefferson Nickel doubled dies https://www2.briansvarietycoins.com/l...
Error Reference https://www.error-ref.com/
Ebay error listings https://www.ebay.com/b/US-Coin-Errors...
Heritage error listings https://coins.ha.com/c/search/results...
Stacks Bowers error listings https://archive.stacksbowers.com/?q=1...
Great Collections error listings https://www.greatcollections.com/Auct...
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