$43.74

Vintage Antique 1925 Keuffel & Esser Slide Rule Model N4053-3 10.75" with Cursur

$10

Vtg K&E Keuffel & Esser Slide Rule 4081-3 Log Duplex Decitrig USA #456796

$41

Pickett Slide Rule With Leather Case Model N800-ES Speed Rule Log

$105

Pickett Slide Rule N600 - ES Leather Case - Made In USA

$15

Vintage Kennametal Cutting Speed Removal Rate & H. P. Calculator & Instructions

$14.95

Vintage Post Versalog Leather Case + Strap + Belt Loop No Ruler-case only 12.5"

$15

VTG K&E No. 4161 Slide Rule Manual & Relay Bamboo Slide Rule Instruction Books

$5.97

Vintage 1973 US To Metric Converter Pocket Slide METRIVERTOR Conversion Tool

$8.74

Dietzgen Slide Rule N-1767 National w/Black Sleeve Engineering ~ VTG Made in USA

$20.39

Vtg 1951 GE Raceway Calculator~Circular Slide Chart~Box Guide In Orig Envelope

$25

1947 K&E Keuffel & Esser Co NY 4081-3 Log Log Duplex Slide Rule w/ Leather Case

$9.95

American Slide-Chart Metric Conversion Chart NJ National Guard 1974 Illinois