Following the rating system generally established among car collectors, this comprehensive value guide provides the values, in five degrees of condition, of antique American farm tractors and crawlers built from the turn of the century through the 1950s. Each chapter is devoted to one of the period's major manufacturers -- John Deere, Farmall, Caterpillar, Oliver, Minneapolis-Moline, Ford, and more -- and the values listed are based on prices actually realized at auction. In addition, two expert collectors compare their notes on each model, while the expert photography of Randy Leffingwell depicts the tractors and crawlers discussed.