found these today when out shopping.. missed my turn and we ended up on a side road.. Not sure of brand ... John Deere. Sheppard .. 1st time I have seen one.. found some neat info on the sheppard thought I would share it also Also in 1954, the SD-4 was introduced. This was the largest Sheppard tractor and included several innovations. The most important of these was a Sheppard-designed and built power steering unit. The power steering unit was later applied to heavy-duty trucks and eventually became the primary product of the company. Model List price Cylinders BHP Transmission Displacement SD-1 $1,095 1 4 3-speed 28 cubic inches SD-2 $2,695 2 24 4-speed* 126 cubic inches SD-3 $2,995 3 32 4-speed* 188 cubic inches (200 optional) SD-4 $4,147 4 51 10-speed** 318 cubic inches * An optional under/over-drive auxiliary transmission was available for the SD-2 and SD-3 which gave 8 speeds. ** A torque converter was optional on the SD-4.