Allis Chalmers 1 Avery 1 Buick 33 Cadillac 29 Case 1 Caterpillar 1 Chevrolet 54 Chrysler 31 Cletrac 1 CO-OP 1 Crosley 2 DeSoto 33 Diamond T 1 Dodge 53 Eagle 1 Farmall 1 Federal 1 Ford 64 Ford Tractor 16 Fordson 1 GMC 18 Harley-Davidson 2 Huber 1 Hudson 15 International 3 John Deere 1 Kenworth 1 Lincoln 24 Love 1 Massey-Harris 1 McKormick-Deering 1 Mercury 31 Minneapolis Moline 1 Nash 18 Oldsmobile 34 Oliver 1 Packard 20 Plymouth 38 Pontiac 31 Silver King 1 Studebaker 25 Willys 20 Reo 1