Naaa They wont be lost as im only 40 years young,lols. But agreed we need a list,might be a job for me to get into:) Ok so a Roto 2 your making it too easy for me.....ok the model 2 run went from aprox between 8,500-9,000 up until 100,000.
So yours falls into the mid run category. early line code should be 2 or 6 with some exceptions. definately has tin wheels (circlip axles)which ran up until approximately the mid 75,000 then the remainder where the plastic wheels. red embossed smiley face choke,circlip carby,central bun muffler,metal T/C plastic for some later. ESS pulley(LRG stamped)Model 2 badge with straight 18 not curved as for the model 1,and offset front axle mounts(not straight as for model 1) Thats about it. one additional( some early model 2 Rotos ran model 1 parts,not so much chassis but head,barrel and brass nut carby,have seen some examples right up into the 40,000s. these parts are also a lot harder to find.
Got any more? lols.