Yes, I remember sitting while driving for hours on end and reading that "Irrigation Pump Company" imprint on aluminum colored spinners. Seems we had them on everything except the WC which had the wooden knob spinner.

Our first couple of pickups we had in the '60s were non-PS. Spinners in there too. You could a cool one from Western Tire & Auto store that folded sideways so you could choose to run spinner or not.