This years show tractor is the Allis Chalmers 7580 4wd Black Belly. This is the 7th tractor in the 4wd series produced by Ertl for the Toy Farmer. This is a very nice model and features detailed tires and wheels, cab glass, 3pt hitch, and a good overall finish.
Really my only complaint about this tractor is on the 1/64th version of the model the roof of the cab. It is made of white plastic and feels flimsy, not matching the rest of the otherwise high quality model. It would have taken very Little time and effort to simply paint the cab top instead of just using colored plastic.
If you would like to read more about the classic 4wd series of National Farm toy show tractors you may enjoy the article I wrote on all of the previous models from last year. http://zacstractors.blogspot.com/2007/11/starting-in-2003-toy-farmer-and-ertl.html