It's pretty clear that Brancquaert advertised his guns as winning at the Pigeon Ring starting in 1897.
The Littlegun site lists A.J. Defourny as starting in 1894
http://www.littlegun.be/arme%20belge/artisans%20identifies%20d/a%20defourny%20gb.htm
I couldn't find any Defourny catalog repros but some of his guns were chopper lump