A definite counterfeit although it somewhat gives the appearance of being genuine:
http://cgi.ebay.com/RUSSIAN-IMPERIAL-PETER...1QQcmdZViewItem
Coins from the same dies were offered by the well-known Belorussian seller pretending to live
in Australia. That individual (perhaps the same person as the present seller) is now listing
yarn on eBay.
This piece is probably cast rather than struck.
RWJ