hi terry,
Francotte knockabout guns were in their low to middle grade,as I understand it, your basic Francotte boxlock, with not much engraving, but I believe the working parts would be very well put together, just not as fancy as higher priced models.
According to the dates on in the Other useful Information page the 64xxx would place it around 1907.
I would get it checked out by a gunsmith who knows old doubles,especially the barrels, to check the wall thickness, chamber length and general shoot-ability etc...just to be safe.
Do you reload your own shells?...I'd suggest lowish pressure shells
A lot can happen to a nice old gun in 110 years....most of it bad
Francottes are nice guns..even the plain ones
cheers n good luck with it..
franc