Aristo 90193 Bopp & Reuther Venturi slide rule case 1970 Germany

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Aristo 90193 Bopp & Reuther Venturi slide rule with sheet and case, made ca 1970 in Germany

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Description

This is a very specialist slide rule made by Aristo for Bopp & Reuter GmbH from Germany. This set contains the slide rule, the original Aristo box and the nr. 50 tab inlay sheet. It was created for the calculating of Hydraulics, steam and pressure. This model is the rare 09193 double sided with rubber feet on both sides.  Everything is complete and in good condition with some signs of use and age. It measures 33,5  cm or 13 1/4 inches. Check the attached video on how to work your vintage man tool : slide rule operation instructions!

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