Model 320 tractors were built in two distinct phases. Phase 1 had a vertical steering wheel while Phase 2 had a slanted steering wheel. 2,566 Phase 1 tractors were built and 518 Phase 2.
Serial number 320001 was the first Model 320, built June 25, 1956.
Serial number 325518 was the last Model 320, built August 2,1958.
Serial numbers 5200000-5200018 were shipped to the Engineering Department on May 4, 1956.
S/n 5200019 was the 1st Model 520, shipped July 16, 1956.
S/n 5213189 was the last Model 520, built August 1, 1958.
Serial numbers: 7200000-7229002.
Fuel: LPG/diesel (run) and gasoline (start)/gasoline/All-Fuel.
Serial numbers: 6200000-6223247.
Fuel: LPG/gasoline/All-Fuel.
Tractor-scraper.
Serial numbers 8400000-8400062.
Tricycle.
Serial numbers: 140006-161096.
WheelsAge.org '2005–atual