The first thing that struck me was all those draftsmen at drawing boards. No CAD, no Solid Works just sharp pencils and good erasers. Painstaking attention to detail without the benefits of being able to change stuff on the CAD assembly and have it translated to the respective drawing. Nope, that required a complete redraw of the changed part plus any other bits involved. Oh, and no CNC, Just highly skilled people doing their thing. Interesting, specially for one who had the good fortune never to experience the horrors of war. My thanks to those who fought for our freedom on whatever continent we now dwell.
John B