QUOTE(RARENUM @ Jan 6 2007, 04:32 AM) [snapback]291870[/snapback]
[attachmentid=2057]Interesting coin from my collection.Grivennik 1756 no m/m/ Unlisted.
For a moment, you had me confused because these are normally struck without mintmark.
Then I realized that it was the mintmaster's initials which were missing from the cartouche on the reverse.

Neat coin and I assume very rare, because it is missing from every reference I checked.
Also, I see some repunched characters and the overdate, apparently 1756/55 and it's in nice shape to boot.