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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.
February 15, 2013. The John Deere Model A Tractor was the first true row-crop tractor and is one of the most beloved tractors in John Deereâs 175 year history. The first Model A was manufactured in April of 1934 and came equipped with an impressive 25 horsepower engine and a 4-speed transmission.