Vintage Engineers Drawing Tools Boxwood Rule Clutch Pencil Leads Drafting

Vintage Slide Rule Hemmi No. P262 Made In Japan with Case

Pickett Microline 140 Slide Rule Calculator Vintage Ruler Math Yellow With Case

Vintage Sun Hemmi Japan Pocket Slide Rule In Leather Case

Vintage Industrial Steel Drafting Ruler (National Rule Co. Rochester N.Y. USA)

Vintage Sun Hemmi Bamboo Engineering Slide Rule System mid section removes

Vintage PIC British Slide Rule Engineer Calculator w Case Scientific Drafting

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