Tim,
That catalog is quite similar to the 1930s Etienne Jallas & Cie catalog. They sure didn't change much, the layout and format is almost identicle.

The blued R copy with the rectangle on the barrels was, if I am not mistaken, a Mouthier gun. The guns are usually marked with whoever was running the show on the flats, as well as F. Darne.

Couldn't help but notice the pleasant exchange of information in this post-thanks, you guys.
Best,
Ted