$29.99

Lawrence Engineering Slide Rule Peru Indiana Drafting Tool Vintage USA

$46.39

Concise Ruler Circular Slide Rule No. 300 100829 Made IN JAPAN 110mm

$59.5

Pickett Model 520-T USAF Aerial Photo Slide Rule Type A-1 ~ VTG w/ Leather Case

$9.99

INTERESTING 1968 STERLING SAVINGS BEST BUY GUIDE RULE / SLIDE CHART

$55

Vintage 10" GEO-TEC Slide Rules - (New) Box of 5 - 341-3526 (Open Box)

$44.95

VTG K&E Kueffel & Esser Slide Rule N4080-3 Log Log Duplex Trig Case USA 1947

$35

1962 Pickett Slide Rule Model N-500-ES With Leather Case

$4.76

Dwyer Air Velocity Calculator Slide Ruler F W Dwyer Manufacturing Co. Vintage

$14.95

Boxed-Lawrence Engineering Pocket Wood Slide Rule, Made In Peru, Indiana USA

$46.54

Relay Bamboo Slide Rule 82 San-Ai Keiki W/ Case Retro Scientific Engineering R2

$7

AVCO Community Developers Metric Standard Measurement Conversions Slide Rule

$30

Keuffel & Esser N4053-3 Polyphase Slide Rule w/ leather case and OB