This special slide rule comes in the original cardboard container are made by Aristo from Germany. This model is the 90184 BG a special slide rule made for the Company Baustahlgewebe from Düsseldorf Germany. This slide rule is specifically made for calculating concrete steel mats for use in construction. It has scales on the front and back with a small original yellow part. Curser and rule are complete there are signs of normal use on the slide rule and cursor. The container is in complete and in good condition as well. It measures 32 cm or 12 1/2 inches. Do check the attached video on how to work your vintage man tool : slide rule operation instructions!
Aristo 90184 BG Concrete slide rule case 1960 Germany
€65.00
Aristo 90184 BG Concrete slide rule in case made ca. 1960 in Germany
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