$24.19

Chemical Industries Magazine May 1936 Dow Organic Solvents Cryolite

$13.5

Vintage Faber - Castell 1/98 ELEKTRO Slide Ruler Made in Germany

$48

Engineering - Vintage STAEDTLER Mars Lumograph Drawing Drafting Leads No. 200-H

$16.66

** Vintage - LUFKIN - RADIUS GAGE - number 177 - with ORIGINAL BOX **

$26.98

Vintage Linex A1618 M Parallel Ruler #263

$20.25

CAPTAIN FIELDS 'MATHEMO SERIES' IMPROVED 15" PARALLEL RULE BOXED

$27

7x RULER VINTAGE ENGINEERING inc Armstrong Harper & Tunstall West J Halden

$17.99

Vintage Mid-Western Machinery Company Inc Conversion Factors Chart 1964

$60

VTG 1940s PULVI-MIXER Road Making Machine Sketch Prototype Photo SEAMAN MOTOR WI

$67.51

Stanley London Brass Compass - Working

$438.82

Vintage Instrument Set, German, Technical Drawing, Riefler, Munich, Circa 1950

$20

Vintage GE General Electric Circuit Breaker/Fuse Selector Slide Chart (A2-10)