1939 ? GMC Trucks Series 400 2 1/2 Ton sales folder. Specifications for Model AC-400 including 402, 403, 404, 405, and Model AF-400 including 401, 402, 403, 404, 405. Good condition with minor wear and soiling.  Photos and illustrations and descriptions of chassis, engine & chassis features, dimensions, testimonials. Form A-308. No date printed on the folder. Two-sided printing on one sheet of paper with multiple folds.