Ok, I see what you mean re: the brake bridge. I’ll try to find something that matches this one.
Re: the BB, so neither Carltons nor Raleighs had serial #s going round the BB? I do see on Kirt Kaminer’s site that yes, the only photos with BB #s have them all oriented across the width of the shell... were all Carltons like that too?
And if that’s the case, then maybe this is not a Raleigh/Carlton product at all??