. >>> when al joins us now - i hear we have a rare allis- chalmers this week... >> al joins us now with the tractor of my youth, which is why it's an antique. >> it comes to us from northwest washington state. this is one of three classic alice chalmers and the owner has in his collection of fuel that drives this doctrine makes it unique. >> it's a wheat plant version. the only tractor they had was this one so they made some wheat plants. they had to go but as with the big boys like mini mall and massey ferguson. in may 200 of these things but they found out they didn't work very good because they didn't have enough power so they discontinued them. to my knowledge this is a propane model, and i've only seen three of them. the wheels on the back are different. they made them like that, i went to an 184.6 tire which the other tractors did not have. they put a different hitch on the back and the big fat vendors which is the only difference. the propane tractors out here were never very popular at all. i knew a few when i was a kid but they were not use out here. propane was born in the mid