Comment by tkb

The children's maths/puzzle book "Nut-Crackers" (John Jaworski and Ian Stewart, 1971) had a slide rule printed at the back of the book - two strips each numbered 1-50 - to cut out and try out.

The authors commented "If you get really interested you can make much more accurate slide rules, or you can buy them for about £1." I fear not any more...