Sweet.
It does not have a
lettre annale so was made 1910-1921.
Interesting that it is marked
Poudres Pyroxilees. Pyroxile = gun cotton = nitrocellulose.
SO the gun was designed for Nitro powders, but does not carry Smokeless Powder proof. That is not uncommon with Belgian guns built for export to the U.S. Smokeless proof was optional until the Proof House revisions of 1924.
Obviously the Siemens-Martin steel is good stuff. 'JV' could be Joseph Vandalem de Chaudfontaine who made the tubes from Siemens-Martin steel provided by
Acier Cockerill Liégeoise
Sorry but no help with the model.
Cornell Pubs has a 1912 Francotte catalog
https://www.cornellpubs.com/old-guns...p?item_id=3196