$18.52

Vintage Unique Log Log Wooden Slide Ruler w Original Case 1950s Made in England

$79.99

ANTIQUE GERMAN DESKTOP MECHANICAL TOOTHED-WHEEL RESULTA 7 FUNCTIONAL With Cover

$13.47

VINTAGE B.R.L ACADEMY SLIDING RULER RULE ENGINEERING MATHEMATICAL STATIONARY 10"

$25.57

Vintage BRL Slide Rule Academy 300 in slipcase & Instruction Leaflet

$70.86

1982 Nuclear Therma Power Plants Plant Atomic Station Reactor book Russian NPP

$74.06

Antique Victorian Rolling Ruler, Brass And Ebony Stanley Make

$25

Vintage BBC Brown Boveri Swiss Engineering Company Brass Belt Buckle

$26.11

Joblot Collection of Vintage Technical Drawing Instruments Compasses etc Germany

$16.95

Keuffel & Esser Co. 4153-1 Vintage Slide Ruler

$35

Scenarios for Hawaii's Communication Futures, UH Manoa, 1978

$13.47

Kronos Compass Set Incomplete

$26.92

2 x Vintage A W Faber & Castell Armstrong Scale Rules with cases