MVC, if you look through the above posts, we have come to the conclusion that it was an atachment for some form of tiller.
I'm guessing there was a tiller called the 'Versa Tiller' that may have been made by the same mob (farm Fitters) and that this was an accesory to it.
However, while our guesswork seems to fit rather well, no one seems to have actually seen this particular item before, so it may actually be an alien chook from Pluto.
However, I would suggest probablity points more towards the tiller attachment theory.
Hope this helps clear it up.
Also, yes, it does seem reminiscent of a champion, however, looking at the picture, and using the wheels as a guide, I'm thinking this think might be only 12" or so.
