
SLIDE RULER Engineering Service Indiana USA 10B In box with instructions Original 1950s
° Measures approx cm 25.5 x 3.
° On the ruler is written “Engineering Instruments Inc, Peru Indiana Made in U.S.A.”
° In it’s box with booklet, well kept by collector
° In laminated wood stock.
Tags:- SLIDE RULER, ARCHITECT RULER , BUILDING RULER, ENGINEERING RULER, 10B SLIDE RULER, 10B RULER, HARWOOD RULER, SLIDE RULER INDIANA, SEWING RULER