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					Originally Posted by Jim McDougall
					
				 
				I agree on that 'mark' Iain. On the blade, it seems like a simple and 'wedge' type, and as Blue Lander noted, perhaps it may indeed be a briquette. I have seen many with these kinds of blades, and that would probably bring the blade into 19th century....these were around pretty much through the century. 
			
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 The briquette idea is pretty compelling I think. Some of the Belgian models as I recall have this profile with no ricasso.