Marci Fab, Je savais qu'il fallait attendre que tu clarifies les choses.
To sum up about Chris' inherited gun:
It is a French 12 gauge made in Saint-Étienne by Auguste Blondeau probably in the 1930's. It is double proofed at the proof house of Saint-Étienne. It has three crossed fronds on the barrel flats which are an indication of barrel quality. These barrels were probably made by Blondeau himself and this particular mark is likely a Blondeau quality mark copying but slightly different from similar barrel quality marks used by Jean Breuil. The barrel was honed by C.S (unknown). It has a Verney-Caron type top key/lock, 65 mm chambers (2 1/2"), probably the standard French 27.5" barrels. It may be a model classified as "England."
Another gun enthusiast on Passionlachasse also commented on "AB" being Auguste Blondeau and posted these two pictures. (Note "quadruple verrou" - quadruple lock - which looks to be a version of Verney Caron...patented by Blondeau as "Solidgripp" as FAB mentioned. Don't know what is the difference).
![[Linked Image from i.imgur.com]](https://i.imgur.com/y9i2Ksn.png)
![[Linked Image from i.imgur.com]](https://i.imgur.com/o7uWfgR.png)
FAB also commented that "Canon Prima" was a Jean Breuil trademark. This I'm not at all sure of. There were several guns pictured above and I'm not sure to which of them FAB was referring. I believe rather that "Canon Prima" is an Auguste Blondeau mark and therefore the "crossed plumes" are AB quality marks. The example FAB posted from naturabuy is below. It has the AB under crown mark, the "crossed feathers" barrel quality mark, and "Canon Prima")
![[Linked Image from i.imgur.com]](https://i.imgur.com/F0FFZr5.png)
![[Linked Image from i.imgur.com]](https://i.imgur.com/wZB8VsS.png)