Bruning 2401* 5in Slide Rule and Leather Case F*S Mid Century Chrome-plated brass exposed metal components

Chrome-plated brass exposed metal components for corrosion resistance

this book also offers an incisive narrative of the history of astronomy and an evocation of what we see when gazing at the stars

This is a complete manual and note that it will show some age and wear blemishes

commercial office typewriter designed for the student - home user - or small business

When the rocker is released the needle remains clamped in place making transfer of the reading to the "computer" ring much easier

Bruning 2401* 5in Slide Rule and Leather Case F*S Mid Century Chrome-plated brass exposed metal componentsBruning 2401 5in Slide Rule and Leather Case Really neat and very practical 1960s 5 inch plastic rule #2401 Simplex With Bruning Leather Slipcase. 5" scale, with 6" total length. Scales on both sides of the center post. Front Scale 12. 5cm A [ B, CI, C ] D, K \\ 5in Back Scale: [S, L, T ] Leather slipcase is unmarked, Made in the USA FREE standard shipping to the 48 contiguous United States