The maker was part of the Lochet family:
http://www.littlegun.be/arme%20belge/artisans%20identifies%20l/a%20lochet%20famille%20gb.htm

http://www.littlegun.be/arme%20belge/art...aurent%20gb.htm

Lochet was a huge operation. They had their own barrel shop in Nessonvaux. The quality of their guns varied depending on what the buyer contracted for.

Pete