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

that's ~ 3000 Hermes typewriters

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

Bendix Neon Timing Light - Mid Century antique

I have owned this machine for ~30 years and used it regularly for optical coating and thin-film thermal evaporation

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