It was an dealer option on the 34-35 trucks except all the "single unit bodies (panel, canopy express and suburban)which came with driver side only. The 36's on high cabs it came standard on driver side and dealer option on passenger. 36 was the first truck with inside rear view mirror (it also had the left upper door hinge outside rear view mirror. You can order a reproduced "1936 Engineering features" book from "Crank'en hope publications" 461 Sloan Alley, Blairsville, PA 15717 phone (412) 459-8853
