$50

Vintage Glass~Wood Mechanical Drawing Industrial Salvage B&L Bausch & Lomb Lot H

$15.05

Vintage Aristo-Scholar VS Slide Rule~Nr. 0903LL In Case

$9.95

OHMITE PARALLEL RESISTANCE CALCULATOR OHM'S LAW CALCULATOR C1949 SLIDE RULE

$28.42

E.O Richter & Co Vintage Schola Pracision Drafting Drawing Tool Set

$31.11

Old Vintage JOB LOT x 7 RULERS Blundell Harling Hall Harding Verulam etc

$48

1935 Tables of Conversion Factors For Engineers Dorr Company Antique Booklet

$51.59

Vtg 1910/11 Engineer Renderings Lenior City TN Car Works Bearings/Gear/Brackets

$27.05

M H Mear & Co Production Engineers Calculator

$35

VINTAGE Schoenner GERMAN DRAFTING SET 6 PIECES USED

$16.35

Vintage Eyre & Spottiswoode Cardboard Scales Set Measures draughtman’s

$6.77

IMPROVEMENTS IN SUSPENSION BRIDGES PATENT MASCHINENBAU NURNBURG GERMANY 1898

$40.6

SHELL SLIDE RULE ORIGINAL CASE DRAWING INSTRUMENT vintage FRENCH petrol company