Oddball machine

Just this week I picked up an old rotary tiller. It was made by the Milwaukee Equipment Manufacturing Company of South Milwaukee, Wisconsin. It is a model number JR12-C3. It is in pretty good shape and the old 3 hp Clinton engine fired right up and runs nice. It does need some new bearings on the tine flanges. If I can get it apart I will change them. I don't have any pictures yet but will try to add some on monday.
Does anyone here know anything about these? I googled it and the only thing I could find is an excerpt from this book on Amazon. http://books.google.com/books?id=Vx...ifzaAw&sa=X&oi=book_result&ct=result&resnum=1

Any idea what it might be worth? Thanks. Jim....