Logarex 27206 Strojexport Pump capacity pockets slide rule 1960 Czechoslovakia

This plastic slide rule was made by Logarex from Czechslovakia in the 1960 with designated 27206 (aka Strojexport for the Sigma pumps Company). It comes complete with blue plastic Strojexport signed sleeve.  The slide rule gives different values for calculating pump capacity. On the back of the slider there are an inch and centimeter scale for length measurement. Slide rule and cursor are on good condition, both made of plastic. Everything is complete with some signs of normal use and age. It measures ca. 15 cm or 6 inches long. Do check the video below on how to work your vintage man tool : slide rule operation instructions!