Is that not one of the things in a childrens tv programme?
Ha ha ha - looks like it should be doesn't it !
Some cursory research suggests that all British Anzani Iron Horses, out of the factory, were 2-wheel tractors: I can only guess this is either a well-found one-off Anzani prototype or a user-modified machine. Mr A Anzani had a finger in many motive pies - quite interesting history! I'm wondering why more old 2 wheeled Anzani Iron Horses are not available when one can still find Howards plodding on !?