Can't tell you in what form the tubes arrived Raimey, but it's clear from the V-C catalog that the steel came from the Jacob Holtzer firm in the Loire Valley. The information I can find on Holtzer (in French) indicates they made barrels. Weren't Breuil and Bernard making barrels prior to WWII? In Bernard's case, if not Breuil's, prior to WWI? So why not V-C?

Very odd, IMO, that a gun of this quality has no SN. V-C, as early as 1922, was selling guns by other makers: Browning A-5's and handguns, for example. But no non-V-C side by sides. And the only barrel steels they mention, other than "acier comprime", are diamond steel and 3 different types of Holtzer steel.