Bruning 2401* 5in Slide Rule and Leather Case F*S Mid Century this book also offers an

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 high quality extruded aluminum tripod

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

From dry Tucson

Bruning 2401* 5in Slide Rule and Leather Case F*S Mid Century this book also offers anBruning 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