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

Vintage K&E 4081-3 Log Log Duplex Decitrig Slide Rule – Keuffel & Esser – Damage

Vintage Keuffel & Esser Co. 4081-3 LOG LOG DUPLEX DECITRIG Slide Rule and Case

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

Vintage Sterling Decimal Trig Log Log USA Made Slide Ruler W/ Case

Vintage Dietzgen No. 1767P Slide Rule With Case Made in USA

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

VINTAGE KEUFFEL & ESSER KE N4080-3 LOG LOG DUPLEX TRIG SLIDE RULER & CASE