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					Originally Posted by  corrado26
					 
				 
				Lacaille l'ainé was Lacaille, Michel Charles *1799 and working at Blois in 1847; he was the son of Lacaille, Michel-Leclerc. (l'ainé is the French word for "the first born"). 
			
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Thank you, Udo, such good information!
But that seems to indicate a connection with Lacaille as gunmakers rather than suppliers. Perhaps they were both?
I am wondering if the lack of a makers name on the lock plate is an indication that it has been converted from flintlock to percussion. I don't know how to tell. Does the plate get replaced?  The wood to metal fit around the lock is certainly not as good as the other side.