ITY & co gerorgian? silver wine coaster unknown marks

[sanssouci6]

here are pics of a wine coaster i have had for awhile. as you can see it has the lion passant a gerorgeIII ? duty mark, the makers mark of ITY&co and a weird date letter of a crowned K in an oval. does anyone know what any of that means? i can't find anything that remotely looks like this in any of my hallmark books. i don't think it is sheffield plate.

http://www.flickr.com/photos/8646710@N05/528619850/
http://www.flickr.com/photos/8646710@N05/528619810/

[Granmaa]

That's a very nice piece.

It was made in Sheffield 1809 by John T. Younge & Co.

Miles

[sanssouci6]

duh.
i was not thinking about the town mark being in the same cartouche as the date letter!
thanks so much

[Granmaa]

The date letter and citymark in one cartouche is peculiar to Sheffield from 1780-1854, and was only used on small articles.

Miles