I'm not going to start a technical definition war of 'forgery' versus 'counterfeit' and I will leave it as that.
In the history of numismatics, while it might seem to be easy to claim counterfeits were produced by a group of criminals, this is not necessary true and official mints have been involved in producing counterfeits for various reasons.
The top three that comes to mind are as follow:
Russian 5 kopek struck in Avesta mint, Sweden
http://www.stacksbowers.com/browsea...014&Lot=1474
Dutch ducats struck in St. Petersburg, Russia
http://goldducats.com/about-ducats/...d-forgeries/
This is not strictly coins but it's related - Operation Bernhard
https://en.wikipedia.org/wiki/Operation_Bernhard
There may be more cases - please feel free to add more!
In the history of numismatics, while it might seem to be easy to claim counterfeits were produced by a group of criminals, this is not necessary true and official mints have been involved in producing counterfeits for various reasons.
The top three that comes to mind are as follow:
Russian 5 kopek struck in Avesta mint, Sweden
http://www.stacksbowers.com/browsea...014&Lot=1474
Dutch ducats struck in St. Petersburg, Russia
http://goldducats.com/about-ducats/...d-forgeries/
This is not strictly coins but it's related - Operation Bernhard
https://en.wikipedia.org/wiki/Operation_Bernhard
There may be more cases - please feel free to add more!
My partial coin collection http://www.omnicoin.com/collection/gxseries
My numismatics articles and collection: http://www.gxseries.com/numis/numis_index.htm
Regularly updated at least once a month.
My numismatics articles and collection: http://www.gxseries.com/numis/numis_index.htm
Regularly updated at least once a month.




















