Faber Castell Ruler No 57/87 Vintage School Slide Rule for Draughing Drawing

Vintage Sun Hemmi Japan Pocket Slide Rule In Leather Case

Vintage Sun Hemmi P280 Slide Rule Japan Technical Calculator Case Boxed 1970s

JAKAR NO.29 250MM/10" STUDENT LOG/LOG SLIDE RULE WITH CASE

Vintage British Made Engineering Sliding Ruler A C Thornton Ltd (P I C No 8658)

Vintage JAKAR Pocket Slide Rule - No.523D - Made In Japan - With Original Sleeve

Vintage PIC Slide Rule No 251 British Thornton in Leather Case. Made In England

Vintage A.G. Thornton Electrical Slide Rule P.I.C. No. 121 27cm 10" Boxed. GC