$23.89

Slide Rule Sun Hemmi Japan Hughes-Owens Wooden in Original Case

$8.99

St. Louis Diecasting Date Finder Circular Calendar Slide Rule 1993 Perrygraf

$67.32

Antique / Vintage Wooden Set Square / Gauge . T.H.Holding ,7 Maddox St.W. #

$53.87

Vintage Cowley Automatic Level Surveying Instrument with Cases & Papers

$24.99

Vintage SCANBE Manufacturing Corp. EMI RFI Military Specifications Standards USA

$26.92

Diwa Technical No 201 &101 10 Inch Slide Rules Mahogany Case Denmark Mid Century

$15

vintage Junior Engineering Technical Society (JETS) award medal First Place

$17.99

IRC RMA Standard Resistor Color Code Chart ~ Adopted November 14, 1939

$397.28

War Department Hilger & Watts No. 2 Microptic Theodolite Bullet Dome Case Superb

$75

VINTAGE PRECISION TORQUE BALANCE No. 2540 MADE IN HOLLAND

$9.14

Vintage A W Faber & Castell 2722 60's Scale Rule Engineer Math Tools Measurement

$28.95

Vintage Engineer Lensatic Compass Directional Hiking Navigation