Vintage Staedtler Mars No.544 28 Slide Rule with Case – Made in Germany

VINTAGE Mini Logarithmic RULER Soviet Slide Rule 1971 In Case KLPZ Kyiv USSR

Vintage Logarithmic Ruler Soviet Slide Rule Ussr Calculator with case

Vintage Pickett Microline 140 Yellow Slide Rule with Case in Excellent Condition

Vintage K&E 4181-3 Slide Rule 1947 Keuffel & Esser Co. Used. In Great Shape!

Frederick Post Co. No. 1444K Slide Rule Hemmi Japan with Top Grain Cowhide Case

Original Soviet Logarithmic Ruler Slide Rule Vintage USSR Calculator with Case