Hi Erik
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!
Dave