The other insignia shown by 67_1183 has a shield that looks very 1950s. Having worked for a large airplane company that liked to change names of divisions every time a shiny new "Harvard" vice-president had a better idea I can't discount that name prior to 1967. I was only interested in 1967 and later.
I opted for an early retirement after yet another "shareholder value" debacle including the teardown of cubicles and going full "open office."
