Vintage Shure Brothers Reactance Slide Rule WWII Army Navy w/ Instructions For Sale

Original Shure Brothers Reactance Slide Rule complete with its original instruction booklet and factory envelope.This specialized engineering slide rule was produced by Shure Brothers of Chicago for calculating resonant frequency, capacitive reactance, inductive reactance, coil “Q,” and dissipation factor in radio and electronics work. It features the Army/Navy (E) emblem, placing it in the WWII-era military electronics period.Unlike standard slide rules, this was a purpose-built tool used by radio technicians, engineers, military communications personnel, and microphone/electronics designers.