Put everything you need to know about International Harvester tractors in your hip pocket! Beginning with the McCormick-Deering 15-30 introduced in 1921, this book includes all wheeled tractors produced up to the last 650, including the Farmall Regular, the Model M, and the Cub. Packed with specs, serial numbers, engine codes, carburetor and magneto codes, decal placement, literature and option codes. Perfect for auctions and flea markets!