$13.53

Vintage Unique Log Slide Rule / Ruler

$6.82

Vintage Cowley Automatic Level - untested

$11

1965 US Naval Labs CA Help Wanted Power Weapons Laser Radiation Eye Pop Art Ad

$16.24

A.G. Thornton draughtsman precision drawing instrument set Original Case 7x3.5"

$31.61

Slide Rules Aristo Scholar Nr. 0903Ll, P10 BRL, Unique Universal Vintage x3

$10.95

Masoneilan Valve Slide Rule w Pouch and Instructions + Control Valve Referen

$20.3

Vintage Blaw-Knox piping flexibility slide rule

$12.99

Vintage 1957 GE General Electric Address Book Date Book & Atlas w/ Maps U.S.A.

$23.36

1969 Lenz Fluid Power Accessories Inc. Engineering Sales Literature Dayton OH

$34.5

DIETZGEN 422 Engineers Cook County IL 127th Mining Transit Book 1921

$71.71

Comprehensive Circular Conversion Calculator Slide Rule Link Hampson Ltd cased

$27.06

Planimeter Hope Graph Co Japan vintage in box