Interesting slide chart by IWA model 514 55 in English, made for the internationally operating Honeywell Company in in the 1970’s. It can be used for valve sizing for liquids, steam and vapor calculation (back and front). It is in very good condition so there are only small signs of use or age from normal use, fully functioning with all parts intact. It comes in the original black sleeve that has also room for housing the instruction card. It measures ca. 20 cm or ca. 8 inches wide. Check the attached video on how to work your vintage man tool : slide rule operation instructions!
IWA 51455 Honeywell valve size computer slide chart 1970 Germany
€25.00
IWA 51455 Honeywell valve size computer slide chart, made in the 1970’s in Germany
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1 in stock
Category: Slide rules
Tags: 1970's, Germany, Netherlands, Slide rule, Working order
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