Vintage 1966 Sama & Etani Concise Slide Rule W/ Useful Data Sheet Government.

Very cool and full of info. Cover says Property of US Government. The back of the slide rule has the Periodic Table and a temperature conversion chart. The pullout piece has useful constants & data with things like energy, pressure, velocity, flow rate, and more. The other side has length, weight, area and volume charts. See pics. Loads of info packed into a tiny package.

Have not seen another one like this with this much information.