Tail seat tractors were not a standard production model, they were built that way using "attachment" options.
The one I'm looking at has a sp on end of serial number, it' a 1941 model. Was just hoping there were more records available. Thanks
Hard to get a true definition of "SP". Appears it may have started out as a catch all for attachments later to become just internal transmission and final drive parts. Still tail seat tractors never were assigned separate production numbers.
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