The Farmall model M- a classic American tractor. Designed by Raymond Loewy, the M was the largest of IH row-crop designs. Features include: a single key rear axle allowed tread adjustment; three plow capacity, belt pulley, PTO, and hydraulic Lift-all, Rubber tires, and optional electric start and lights. On gasoline it produced 33/25 hp. 297,000 Farmall M tractors were produced from 1939 to 1952.