International Harvester 600.
International Harvester 600.
Manufactured by International Harvester Co., Chicago, Illinois. This is a very rare tractor, which was produced only in 1956. It was the largest tractor in the 1956 International Harvester line. It was available with either a gasoline or diesel engine and was rated as a full five-plow tractor. It was followed by the International 650 series in 1956.