$6.11

Angle line ruler 25CB Unique Adjustable Triangle Rule Measure technical used

$10.85

Vintage THORNTON Adjustable Set Square QA51A

$19.99

1960 ~ WESTON ~Bulletin / Supplement ~ Missile Line Resistors Military Use

$16.3

1942 MOLESWORTH POCKET BOOK OF ENGINEERING FORMULA 31st EDITION !

$19.46

c1970 Industrial Scientific Instruments LTD Engineering Catalog Rouses Point NY

$19.99

Linex A1612 M Parallel Ruler Acryl Denmark

$9.99

Rotring Convex ~ R 530 125 0 Compass Parts ~ Made In Germany ~ Boxed ~ Parts

$12

1942 CHEMICAL ENGINEER'S MANUAL (UNIVERSITY OF ILLINOIS

$18.92

Vintage Aristo Slide Rule Model Nr 968 With Partial Case Made In Germany

$15

Vintage 1965 Graphic Steel Weight Calculator

$25

Vintage Linex French Curves-Set Set of Eight-Made In Denmark

$23.36

c1970 The Tomkins-Johnson Company Cylinders Engineering Catalog Jackson MI