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The John Deere model GP was built in five distinct versions through the course of its production: 1  The standard-front GP, or John Deere Standard, built from March 1928 to February 1935. 2  The John Deere two-wheel tricycle-front GP, or GP-tricycle, of which twenty-three units were built between August 1928 and April 1929.
When the John Deere Company had developed the model A tractor, in 1934, they really came up with what proved to be a great tractor. As the country was stretching with growing pains the farmers were eager to reach new highs in production levels, with less labor intensive methods.