Unkiiieee! Lols.
Super nice score jonesy! This example is what I always aim for in my collection, an unrestored original. As unkie says this id keep as is. Strip clean and rebuild the engine, but keeping its original patina. I use penetrol in restorations as it enhances the original paint and seals the bae metal. I tend to only fully restore wrecks like your first examples (red and white). But thats just me. Unkies spot on with measurements for base types I have even seen some model 2/3 bases at 295 300mm. Rear axle for model 1 is also different length and has of course no circlip recess just holes for split pin. Front axles halves are also straight.the model 2 inner is bent s style.
Your left ess pulley is definately a model 2, the right (broken one) is really rough and looks to have less of an edge but its kinda irelavent now
anyway a beautiful original mid run model 2, they dont come like this often. Now I just gotta find the badge post to put up my green model 1 example.lols. actually when I get time ill post my last original in this thread youll be really surprised when they line up as it is near exact in condition mine is 53, 000 from memory.
