$74.43

Kern Swiss Drafting Tool 6 piece Set Switzerland in original case

$13.53

Vintage Drawing Set In Brown Case

$8

1953 Thermodynamic Charts + Special Tables for Turbine Calculations Book Cornell

$19.99

1959 ~ Hoffman Electron Tube Corp ~ Cathode Ray Tubes Klystrons Magnetrons

$155.62

RARE VINTAGE WICHMANN No 1071 DRAFTSMAN BEAM COMPASS WITH TRAMMELS IN CASE

$135.31

Professional Adjustable Theodolite Surveyors Aluminium Tripod Stand Instrument

$9

Vtg 20" x 16" Industrial Machine B&W Professional Photograph #1

$20.28

Vintage Faber Castell "Log-Log" 1/92 Slide Rule in case (b4)

$10.83

Vintage Scale Rule by Reliance Twickenham. Bison advertising

$223.28

E.R. Watts & Son Ltd “Highway” General Utility Level

$13.52

3 Vintage 5" Rulers with cases

$30

Absolute Determination of the Ampere, Using Improved Coils 1939