All of my sources are dry.

Little Gun has a new link up for this maker, but Alan apparently hasn't finished the page yet as the link errors out. (I have his site archived and that link wasn't there before.)
http://www.littlegun.be/arme%20belge/a%20a%20artisans%20identifies%20gb.htm

Jean-Marie Sorriaux's draws a complete blank.
http://pagesperso-orange.fr/mallorquina/source/page0index.htm

Hopefully some one will have a better source(s) for you. If all else fails, you can ask Alan directly. He has several top researchers in Belgium feeding his site.
http://www.littlegun.be/mise%20a%20jour/a%20fiche%20mail.htm

Pete

http://www.damascus-barrels.com/Movie.html