Geeking out over the Faber Castell 2 83n slide rule
If you've ever held a faber castell 2 83n slide rule in your hands, you know it feels less like a piece of stationary and more like a precision instrument from a bygone era of moon landings and bridge-building. There's something deeply satisfying about the way the slide moves—no batteries, no pixels, just pure math translated into physical motion. For a lot of collectors and math nerds, the 2/83N (often called the "Novo-Duplex") represents the absolute peak of slide rule evolution. It was the high-water mark before the pocket calculator came along and changed everything forever. ...