Ferrero H39 Concrete calculating machine
This beautiful round slide rule is as good as they ever were. It functions like a slide rule but it is build like a machine. I can see a persons having a job in a cement factory that used this on a da...
FC 366 prime numbers slide rule – Fantastic Vintage Finds
Sometimes items find me...I bought this slide rule from a bad picture. A picture taken from afar because there were 30+ slide rules in it. I mostly bought it because I noticed the cursor. Not only a s...
Collecting vintage: very CONCRETE slide rules
Concrete calculations
Some are dedicated, like the Aristo 940 and some only have an extra scale like the Faber Castell 3/11 which is a statistic slide rule with added scales for concrete. Yes concret...