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Iowa entrepreneur Jon Kinzenbaw is auctioning about 125 tractors from his personal collection of roughly 600.

The collection, which began after rediscovering his father's old tractor, includes various makes and models from the 1920s to the 1990s.

Kinzenbaw founded Kinze Manufacturing, a global agricultural equipment company, 60 years ago.

It started with the chance rediscovery of his father's old tractor and continued until it sprawled five massive sheds.

Now Jon Kinzenbaw, the eastern Iowa farm entrepreneur who founded Kinze Manufacturing 60 years ago, is preparing to sell about 125 of the roughly 600 tractors he's collected over five decades.

Kinzenbaw, whose love of farming helped him build the global ag equipment manufacturer near Williamsburg where he is C

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