ENGINEERING SERVICE INDIANA USA 10B REGOLO CALCOLATORE NELLA SUA SCATOLA CON ISTRUZIONI
Originale anni '50, misura circa cm 25,5x3. Sul regolo e' scritto: "Engineering Instruments Inc, Peru Indiana Made in U.S.A."
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. Well kept by collector.