Foxboro Hemmi flow and valve slide rule manual 1967 Japan USA

This plastic slide rule was made by Hemmie from Japan for Foxboro in the USA. It was produced in the English language per the 1967 copyright as indicated on the manual. Besides the manual it also has the original Foxboro marked leather case. It is double sided, white with green ends and green slider (stamped Hemmi and Japan), all plastic cursor and rule, also printed with the name of the “Foxboro” . This slide rule is for valve control and flow calculation. The manual is in English. Everything is complete and in great condition with minimal signs of use and age. It measures ca. 34 cm or 13 3/4 inches. Do check the video below on how to work your vintage man tool : slide rule operation instructions!