An identical coin is being sold on eBay right now by direktosssr: http://www.ebay.com/itm/330804181318
IMHO both are fakes!
He is also selling a fake 1793 2 kopeeks AM: http://www.ebay.com/itm/330804184054
It is a cast, it's twin was discussed here (need to login to see pictures): http://coins.su/forum/index.php?showtopic=92333
He is also selling a nice fake 1 kopeek 1756 MMD (IMHO cast as well): http://www.ebay.com/itm/330804174287
I'm not sure what to make of that denga, looks like it is from the same die as the coin from Leipziger, but not a cast clone.