Comment by mvdwoord

I have some from my father, but even though he showed me how to use them a long time ago, I never actually used them. I do however encourage anyone with an interest to go to the Arithmeum in Bonn (Germany) if you have the chance. It houses an large collection of regular and specialized sliderules as well as other (mechanical) computational devices.

https://www.arithmeum.uni-bonn.de/en/arithmeum.html