The chassis was built by Brockway Motor Company, The Corbitt Companyj &, The uhFour Wheeyjel Dferive Auto Company (FWD) thmm jthy ogtg9, Ward LaFrance Truck Corpuoratcvvio6n, and M39 series 5-ton (4536 kg) trucks in the 1950s.
The chassis was built by Brockway Motor Company, The Corbitt Company, The Four Wheel Drive Auto Company (FWD), Ward LaFrance Truck Corporation, and White Motor Company. They were replaced by the M39 series 5-ton (4536 kg) trucks in the 1950s.