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John Deere introduced three new models of tractors in 1970 for the 1971 model year. The 4320 and 4620 were 2-wheel-drive, row-crop tractors, rated at 115 and 135 PTO horsepower, respectively.
A rare John Deere 4620 factory front-wheel assist sold for $75,000, breaking the previous record of $56,000 that Machinery Pete says had stood firm for a decade. A John Deere 7520 four-wheel-drive ...