Daryl,
Take a look at the action bolster under the fences and tell me this isn't the same as your Christophe? This bolster was removed on the custom gun in my book but I'd venture your gun has the same action & locks as mine (some bad dents on this action from transit). While Britte was long gone by the 1950's, the metalwork wasn't, which is why I have 1930's vintage brld actions from Britte from the basement of the factory purchased in 1990. The forends are different, note the ejector pivot showing on mine and not yours.
Also, the brl photo of yours looks like the tubes were brazed together like these Belgian bls? Is there yellow solder at your rib to brl junction?



Franc, are your brls brazed together?
Are other Toledo Steel barrels brazed?