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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.
John Deere 3020 is a tractor that was manufactured by John Deere as part of its New Generation series from 1964-1972.The 3020 is nearly identical to the John Deere 3010 model that it replaced. It has a wheelbase of 90 inches, and a fuel capacity of 29 gallons.ohn Deere 3020 is a tractor that was manufactured by John Deere as part of its New Generation series from 1964-1972.