Re:
Many Thanks Philip and Shaun,
A wealth of information indeed.
Not sure about the age of my frame, but looks to be in the late 1940,s , early 1950,s period, thus fitting your time frame for the brakes. I would imagine that the immediate post second world war period, was a very interesting one from the production point of view. I guess you quite often had to go with what was available, rather than what you wanted.
All of the side pull calipers, bearing "Balilla" in script, have adjustment on the left, like mine. all of the G.B. marked ones are right hand adjustment.
Perhaps further arguement that these were very early imports
Colin