These pumps always got molested,and very seldomly retain their original Faces & Guts.
After the 1974 Oil Embargo,many of them were converted to 4 digit readouts,and single grade Low Octane,Unleaded Fuel.
This one,still having it's 3 digit readout,with "Half Gallon" price stated on the face,covering the multi grade selector as well as the Original Site Glass from when it was built in 1963.
In 1971 Sunoco came out with a Low grade Unleaded fuel titled,"SUNLITE".It didn't last long.