$53.4

3 Vintage Slide Rulers 2 Sterling No. 594 & 1 Small Picket No. 160

$13

CHARVOZ-ROOS SR-105D Slide Rule Made In USA Scientific Mathematics Read

$20.46

Vintage Keuffel & Esser Company 1947 DORIC Slide Rule N9081-3 Black Leather Case

$49.99

Vintage 1947 Keuffel & Esser Co. Slide Rule 68-1251

$35

Slide Rule DIETZGEN w/ Original Leather Case

$64.99

Vintage 1964 Carrier Trouble Diagnosis Chart Slide Rule HVAC Tool w/ Instruction

$74.99

Magnifier for Slide Rule K&E 4185C in Box

$14

Vintage Pickett Model N1010-ES TRIG All Metal Slide Rule With Leather Case

$26.09

Vintage Engineering Instruments Inc. Slide Rule w/ Case – Peru, Indiana USA

$3.95

VTG 1950 Bull Dog Electric Product Bulldog Handy Calculator Motor H.P.

$15

Vintage Mannheim ACU MATH No. 400B Rule W/ Case

$11.99

Perrygraf Beam Span Joist Rafter Computer Western Wood Products Vintage 1971