Haven't a clue. . .have never seen a French import stamp; and in Paris don't know who would have applied it.
The closest we've gotten to looking at stamps on Reilly's sold in Paris is this line and there is nothing I can see that is unusual. This gun of course was ordered in Paris, made in Birmingham, finished in London in 1883, sent to Paris, sold, made its way back to London in the early 1900's, went out to Lebanon, came back to France and then to Belgium.
https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=631208&page=allThe stamp on Ken's Purdey looks like a well-dressed guy with a mustache and necktie, holding a hammer in the left hand and a baguette in the right or something like that. Neat logo.
