Looking at the ArmurieJeannot site, under Armes D'Occasion, they have "Mixtes", combination guns: SXS, Superposes, and "Basculantes" Googling Basculantes gives us dump trucks for sale in India and up and over garage doors in New Brunswick a bilingual Canadian province" - portes basculantes.
Thye pic in the catalogue shows a very chubby actioned gun. What is it? A three barreled gun
Comme Le Colonel LeBrun (LB) je puis parler quelques Francais, mais "basculantes"? Expliquez moi, s'il vous plait!
Michel