A harking for the past?

RetroRamJet: The Castell Novo-Biplex monster, considered the ultimate in linear rules, is hand-powered The 24-scale Novo-Biplex is indeed a monster. I inherited a Hemmi/Post Versalog 1460, with a mere 23 scales, and it’s an utter bear to work with even with the full hardbound manual at hand. TBH, I find the simple Ricoh 102 student slide rule (which a seller on ebay had a whole load, new in box,…