$7.43

Vintage Becker Sand & Gravel Co Concrete Slide Rule Pocket Calculator Cheraw SC

$44.99

Engineer Logarithmic Mathematical Circular Slide Rule KL-1 Calculator USSR #3

$12.99

Vintage 1970 Universal Circle Metric Converter Pencil Holder Caddy Black 4 Inch

$15.85

Vintage * CHARVOZ-ROOS * Trig-O-Log * Slide Rule * No. SR-111 * With Case

$13.99

Vintage Pickett Model N902-T Simplex Trig Slide Rule w/case

$9

Vintage Lawrence Slide Rule with Cardboard Case -Wood - 10 Inch Works Great

$13.95

Vtg Varco Pruden Energy Saving Selector Slide Rule Calculator Guide (A3)

$9.56

VINTAGE FREDERICK POST SLIDE RULE 1457 MANNHEIM TRIG + LEATHER CASE &EQUIVALENTS

$19.99

Vintage Charles Bruning Co. 2420 Slide Rule & Leather Case 2421 USA EUC

$17.5

VINTAGE FREDERICK POST 1447 10”BAMBOO SLIDE RULE MANNHEIM TYPE W/CASE JAPAN MADE

$10.72

Vintage Lawrence Engineering Printers Proportion Rule,  Peru, Indiana 1946

$15

Acu-Math No. 900 Slide Rule With Case Vintage Made in USA