Project No. 3: French Mystery Weapon: 2 videos!

Two you-tube videos explain this fully; the questions are printed in the video. My goal is to locate another similar weapon with more legible markings. Is there one in some French museum?

1. Photos, measurements, markings: (yes that is me at the beginning) https://www.youtube.com/watch?v=qFH76H9IVb8

2. Shooting the weapon with live ammunition (here you meet co-star Mr. Ed:)
https://www.youtube.com/watch?v=INStOiPJNDQ

A fanatik crazy man are you???

Merci beaucoup!

That's really nice to share with us your try with this old french canon.
Thanks! really funny and interesting...

Cannoon Je am a fan of your images ^ _ ^ but I put myself in the place of the soldiers of period