I recall buying one after that in the UK though when I went to work I switch to calculators. We did still use log tables at college in the late 70's early 80's

I recall buying one after that in the UK though when I went to work I switch to calculators. We did still use log tables at college in the late 70's early 80's though the course I was on still had belt drive's in the syllabus - yes the dawn of the industrial revolution type belt drives that ran factories in the 18th century