Old French guns, at least for me, seem to be difficult to research on the net. This piece,
http:// What is it?, has been a bit of a head scratcher for me. Yours being a bit newer, may give you an advantage in determining its maker.
Sorry i was of no help, but good luck in your search.
Edit: sorry, I can't seem to get that link to work, that is the name of the thread though.