The First mower is a model 5 series 2 as is the first engine,both mid runs.The third is very unusual but ive heard of industrial and marine (Non Tiger Engines) Stamped Like This With no Victa.Hopefully another member may know more on the last as Im not entirely certain.A pic will help more,Could even be a model 1 engine,I have heard of strange serial nos on the very early versions of the Model 1,Maybee the first 200 to 500. As for what you paid I dont know,But it seems you got quite a bitand a good score.The 2 accurate model 5 series engines are very good to have.Please get a pic up of the cai806 engine if you can.
