Originally Posted by Dirtdrop
That's not the only one I've seen, but I won't bother finding more examples. Your mind is obviously made up.
My mind is not "obviously" made up, but you have given me one example. I just went and ran thru about 60 pictures of different 3 speeds produced in England from around 1935-1984 and could only find one men's frame that
might be routed on the downtube it was a Red Dunelt, but I couldn't tell for sure because the picture was taken from the non drive side. I think it would be safe to say that the bulk of the English built 3 speed men's framed bikes had the shifter cable routed along the top tube. There may be exceptions to that or possibly an owner chose to re-route the cable that way for some reason. Also the one referenced in the thread does not have a pulley it has the long casing cable similar to what was used on the RSW of the same era. It is a full housing cable that is clamped near the rear axle.
Aaron