Hi Dennis,
I have been reading the “slide rule memories” and found it very interesting. In the back of my center desk drawer, I have kept for all of these years, a Frederick Post Postrig slide rule No. 1462H. On the bottom right corner of the front of the slide rule is an imprint” Sun, Hemmi, made in occupied Japan”. An online reading of the history of the slide rule mentions that this particular slide rule was manufactured in 1949-50 after which time the “made in occupied Japan” imprint was discontinued. The slide rule that I have must have been the one that my father used at his work as a manufacturing design engineer and then passed down to me when I started at Tech in the fall of 1959. Back then, I can still remember some students pushing the slip stick and cursor back and forth as rapidly as kids type on their smartphones today. I’ll bet the young people now might think of us and our slide rules in the same way that we thought of the Chinese and the abacus back when we were young students in the 50’s and early 60’s.

Don Robinson, 1963