Vintage HAFF 315 planimeter in original case platometer

Vintage Aristo Scholar Slide Rule Case Box Instructions & 1960 Tutorial Book

ARISTO STUDIO Nr. 0968 Slide Rule Vintage German Made In original box

Vintage German 1962 ARISTO 0970 Multilog Slide Rule & other rule

Aristo Darmstadt Hamburg Vintage Slide Rule VGC Working Order Made In Germany

Vintage Aristo Studio Slide Rule Made In Germany Engineering Calculator w Case

Vintage POCKET Slide Rule Faber Castell- 5" Architects with Case Made In Germany

Aristo Scholar Slide Rule Nr. 0903 Made in Germany Rare Vintage Stationary