Sperry-New Holland Catalog, "The Innovators," 1977

For centuries, manufacturers have worked to perfect machinery that combines the three major steps of harvesting grain: reaping, or cutting the crop; threshing to loosen the grain from the chaff; and disposing of the straw while retaining the grain. Since self-propelled combines were introduced in the 1930s, competitors have produced ever-improving models. This catalog advertised a range of combines from Sperry Rand Corporation's New Holland Division.