$12.59

PerryGraf OHM's Law Calculator

$24

VTG Bamboo Slide Rule 1447 SUN HEMMI Japan Frederick Post Co. With Case

$20

Vintage ~ KEUFFEL + ESSER Slide Rule ~ Leather Case ~ TLC

$13.49

Lenox Band Saw Selector Chart 1972 Perrygraf Slide Rule ~ American Saw & MFG. Co

$19.99

VINTAGE Slide Rule Teledyne Post 44BA-470 Hemmi Japan In Hard Plastic Case

$28.95

Eugene Dietzgen Maniphase Multiplex 1732 Decimal Trig Type Log Slide Rule w/case

$14.9

Vintage New Old Stock Sterling Pocket Metric Converter Plastic Ruler

$17.98

Slide Rule English to Metric: Volume, Liquid, Weight, Length and Area. Unbranded

$16.95

Vintage Keuffel & Essler Slide Ruler With Leather Case Measuring Tools USA

$78

Very nice SUN HEMMI No. 153 Bamboo Duplex Slide Rule, circa 1938 .

$8.95

Vtg 1964 Phonic Slide Rule Double Sided Learning Tool Vintage E Z Grader

$27.75

Vintage Slide Rule with Protective Case Collectible Classic Mathematical Tool