Glad to see I have sparked the opinion of several others, even if they dont think my tractor is right (GARY HAHA!). The blue color that is on our 20 does not look like the same shade as the 81 from Yuma, it is much lighter. Also it does not have RCAF painted on the side. It is very possible that this tractor may have been purchased by the A Thraska Air airport??? for nonmilitary use??? I guess if nothing else we have a conversation piece!! I am not sure if the front wheels are cast, its at dads 100 miles away.