The following looks bad:
http://cgi.ebay.com/RUSSIA-1-2-ABAZI-1828-...1QQcmdZViewItem
The seller has it marked 1828 but 1826 is the correct date. The crown and style of lettering do not match known genuine specimens. The seller has several other pieces which are either obvious counterfeits or likely to be so. Some of his pieces are genuine, however.
RWJ