QUOTE(stu62 @ Mar 3 2006, 09:26 PM)
Now that we are on this subject,The Bak of England also counterstamped US Bust Dollars, although there are people who doubt the authenisity of the counterstamp.
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According to Coincraft's Standard Catalogue of English and UK Coins a few french Ecu's and American dollars were counterstamped with the oval stamp, as does Spink's Coins of England. These are however noted as being of the highest rarity.
The oval counterstamped silver was heavily counterfeited and resulted in the later octagonal countermark being used, and then again by the complete overstriking of the host coins with the BofE Dollar design.
I wouldn't hold my breath waiting to come across a genuine oval or octagonal Geo.III counterstamp on a US dollar. It would indeed be prudent to suspect the authenticity of the counterstamp on any that you might come across in the wild. ;-)