Argo, thank you for the wealth of information! Looks like Maisonnail made very nice guns and seems to be respected in France. While my gun is plain, what attracted me to it is the quality of the gun and the handling characteristics. I think this gun is perhaps one of the earlier guns they made. The later guns look absolutely beautiful.

Ellenbr, I think Bruiel A. is a abbreviation for Bruiel Aulagner. I seen a post on shotgun world that was saying Bruiel Aulagner was how the barrels were marked originally, then switched to Jean Bruiel.