That's a great looking tractor. Pretty straight for the age.
Your hydraulic valve looks very similar to the one that came
on my 851. Mine is a NAA valve with an adapter plate to fit
the x00/x01/x000 tractors. More valuable as an NAA valve
because they are harder to find. The handle on mine could be
installed from either side and was setup so it went out to the
right hand side of the seat. Nice, because I didn't kick it that way.