technology-related innovations were used in the new series. A computer monitoring system (Sentry) was developed, and IH became the first manufacturer to add a computer to a farm tractor. Other innovations included a "Z" shift pattern, an 18-speed synchronized transmission, a forward air-flow cooling system which sucked air from above the hood and blew it out the front grille, "Power Priority" three-pump hydraulic system, color-coded hydraulic lines and controls, and a new rear-hitch system. The 50 Series had an unprecedented three-year or 2,500-hour engine and drive-train warranty, which later became an industry standard. Although no new sales records were set, IH sold a respectable number of these tractors during their short production time. IH also released the "60 series 2+2s" and planned on making the "Super 70 series" 2+2s, but only a handful of these exist today. On May 14, 1985, the last IH tractor rolled off the factory line, a 5488 FWA. In the late 1970s, IH entered a deal with Spain's Enasa to build diesel engines there as Internacional de Motores. After a downturn in the market coupled to problems with Spain's entry into the European Economic Community threatened the profitability of this project, International Harvester withdrew in 1982. In return for being allowed to escape all conditions of the joint venture, IH lost their up-front investment in the engine plant and ended up selling British truck manufacturer Seddon Atkinson (which had belonged to IH since 1974) to Enasa in 1983. Brand names of the agriculture division IH over the years used a number of brand names to market their tractor and harvesting products: International (1902–1985) Titan (1910–1924) Mogul (1911–1924) McCormick–Deering (1922–1947) McCormick (1947–1958) Farmall (1924–1973) Fairway (1924–1938) Electrall (1954–1956) Cub (1947-1985) Other agricultural products Along with the prominent tractor division, IH also sold several different types of farm-related equipment, such as balers, cultivators, combines (self-propelled and pull behind), combine heads, corn shellers, cotton pickers, manure spreaders, hay rakes, crop dusters, disk harrows, elevators, feed grinders, hammer mills, hay conditioners, milking machines, planters, mills, discs, plows, and miscellaneous equipment. Also produced were twine, stationary engines and wagons. Earthmoving division IH built up its earthmoving division over a period of time, buying companies and acquiring technology. Its heavy tractor range was an established offering, however IH wanted to offer innovative new construction technology. Significant moves included the purchase of the Frank G Hough company which produced an iconic machine