Years ago the neighbor had an smaller John Deere tractor, but it had the offset seat like the "B" and pulled a single plow. . I hauled it in the back of a 70 Dodge 3/4T.
What Model was that?
Later I bought a John Deere 40. I think it was about a 1950 vintage.
Saddlesore, probably an L or LA. They didn't have much power. Around here, the B and an occasional H were about the smallest used. My old JD mechanic friend had an L. It looked like a garden tractor!
http://www.tractordata.com/farm-tractors/000/0/2/28-john-deere-l.html