Jubilee clips were invented in GB in 1921 but I don’t know when they were adopted by Scott. I would imagine that prior to that, they used the double wire type clip that was tightened by a screw or small nut and bolt, (2BA?)
The amount of oil needed to lubricate the forks on your 2 speeder will depend on how much wear there is in the sliders and bushes. If they are worn, the oil will only run out, in which case, little and often will be the answer!
You have not been reading and inwardly digesting your Yowls. Nick Sloan has been running a series of “Among my souvenirs” and in the June 2007 issue of Yowl his article shows an early radiator hose and the story behind it. However he did not know when hose clips were introduced. Hope this goes some way to satisfying your curiosity.
T hroughout the 1920’s Enots hose clips were used, which basically clamp around the hose and tighten with a screw into a captive square nut. They are still readily available from vintage car part dealers such as The Complete Automobilist or The Austin Seven Spares Scheme.