Still got mine, beautifully engineered to take into account temperature changes and the consequences of such, though to be honest I rarely ever used it then (now 45-46 years ago..time flies..) as although I did Pure and Applied Maths and Physics A's, most of the stuff was straightforward or it was just as easy using Log/Antilog/Sin/Cos/Tan tables which I was comfortable with, well at least then, though I can't say for sure these days as there's so much now forgotten or increasingly fading due to lack of use since those days.
Didn't you have to mark your answer with the letters SR or S/R over in the right hand margin if you had employed one to answer a question in GCE O and A exams back then?
I picked up an old Engineering tables book that was looking sad and lonely around 30 or more years ago in a jumbly that had a circular slide rule inside. Still got it and it's an amazing gadget, though like old vernier micrometers and calipers, just totally obsolete now with modern calculators and the digital revolution.
But all this sort of stuff is now lost or simply a funny curiosity these days, probably a bit like Napier's Bones was to us back then.
