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1937 book - The Slide Rule, by Chas. Hoare
KEUFFEL & ESSER CO. N.Y. SLIDE RULE PAT. 6-5-1900 LONG1
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SANS & STREIFFLE #311 SLIDE RULE w/ LEATHER CASE 12"
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Pickett Vintage Slide Rule N109-ES Simplex Trig Rule
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KEUFFEL & ESSER CO. N.Y. SLIDE RULE PAT. 6-5-1900 10" L
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US PATENT for K&E SLIDERULE 1913 slide rule Keuffel Art buy it $13.95
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1908 Slide Rule Manual Circular Calculator Engineering
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Faber-Castell Model Number 2/83N Slide Rule
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