$16.2

Vintage Slide Rule

$26.99

A.W. Faber-Castell 398 Vintage Elect. Eng. Slide Rule in Original Box

$20.25

Faber - Castell, No. 883/21 Architect's Scale Rule

$13.5

Rare Vintage Unique Universal Slide Rule

$21.54

Vintage The Technical Standard Slide Rule Ruler Complete With Box British Made

$13.49

Vintage MINIATURE MEASURING WHEEL. 1.5 inches long.

$27

Vintage Lee Guinness Technical Drawing Draughtsman’s set

$13.43

Vintage "P.I.C." Slide Rule ~ In Box.

$27

VINTAGE HALDEN ENGINEERING TECHINCAL DRAWING DRAUGHTSMAN SET

$34.99

1945 Bethlehem Steel Hardenability Calculator in Original Paper Sleeve Promo

$150.74

Helix pencil compass. Brass. England. Helix pencil compass. Brass. England.

$2411

WOW ! MATRIX Coventry Gauge Roundness Tester Machine, Museum, Collectible