From what I can figure out - it's a Verney Carron made in St Etienne. The 18.4 indicates a 12 gauge and the "Acier Diamant" is the type of steel used in the barrels ("diamond steel").

The interesting stamps are "hors concours" and the proof stamp includes the letters "B.A" and the phase "hors concours 1899 - 1900" appears as well.

A "2" is stamped between the barrels - I assume that this indicates it is a double barrel model. I could not find any other serial number other than the "C-2" that is also stamped on this thing.

Please use the "Provide Feedback" link at the bottom of the page if you have any insight.  thanks

	C2 appears on every distinct part

Disclaimer and Warning:  The contents of this site reflect the opinion of the author and you, the reader, must exercise care in the use and interpretation of this information.  Fishing is a dangerous sport.  You can slip and fall on rocks and sustain severe injury.  You can drown.  You can get hooks caught in your skin, face, eyes or other sensitive places.  All sorts of bad things can happen to you when to go into the woods to visit the places documented here.  Forests, streams and lakes are wild areas and any number of bad things can happen.  You must make your own judgment in terms of acceptable behavior and risk and not rely on anything posted here.  Calibrated Consulting, Inc disclaims all liability and responsibility for any actions you take as a result of reading the articles on this site.  If you do not agree with this, you should not read anything posted on this site.