Well, it does have swivels, so a good chance it's French. Or maybe German, Austrian, or Belgian. If a good look at the stock showed that very minimal round knob that's a French characteristic, that'd make French origin more likely.
Zooming in, the gun has a wide rib that does not look particularly French. Top photo shows the receiver with a notched back at the head of the stock. That, I think, would be less common on a French gun than scallops, or just a straight back.
Just a wild guess: My Verney-Carron catalog from 1999 lists only two side by sides, neither of which was actually made by V-C. ("The Helux and Jet are made for us in the European Union . . . ") The scalloped-back Helux looks decidedly German. The Jet, which does have a notched back receiver, looks maybe more Italian or Spanish. But coin-finished receiver, splinter forend, swivels . . . all of those seem to match Bourne's gun. The gun does have a full PG, if there's a better photo of it available somewhere.
