Nevermore Farms, look at the BLACK label, it says PREASSURE. Read my post #4, this is what I was trying to explain. This setup has 3 functions on it.
Black for preassure control section.
Red for position control section
Yellow for draft control.
YOURS has 2 functions position and draft. Yours has a"red" and "yellow" equivilent. Being an earlier model it does not have a "black" equivilent.
Also look at the stops on the levers. The one for the draft control is missing, and there shold be a 2nd one on the inside quadrant. There was on my 135 that I sold. My 135 was an early model and had the same 2 function style of quadrant like yours.