Made a startling discovery.Pulled a spark plug wire off a plug on my 1950.It has the GM stamped on the terminal....Never have looked for this before.Here it was-right on my own car...Low milage car-original wires....

That answers my earlier question from the original 1936 post and the car I saw with the GM wires..At that time I was asking when they stopped using the GM stamp.Must be on all original wire terminals thru 1952 ('53 has straight terminals and boots)

On our previous discussion was it decided that 1933 or 1934 began with the GM???