Mark asked:
"The rear spacing is 113.5mm ... would that have been 110 or 120mm originally?"
I have a couple of Hobbs frames from 1951 and 1952 with a rear spacing of 114mm, so maybe the 113.5 is original.
Dave Ross Portola Valley, California USA Where I just watched the AToC climb La Honda Rd (Hwy 84) in very unseasonal rain! Saw a few nice vintage bikes under spectators.