Keuffel & Esser Co. Duplex Scientific Engineer Wood Antique Slide Rule c.1920s


Keuffel & Esser Co. Duplex Scientific Engineer Wood  Antique Slide Rule c.1920s

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Keuffel & Esser Co. Duplex Scientific Engineer Wood Antique Slide Rule c.1920s:
$12.99


K&E Slide Rule 

Keuffel & Esser Company
Merchants Slide Rule 

Duplex Rule 

Vintage Antique Engineer Ruler

Circa 1922- 1927


This instrument is for performing 

various arithmetic algebraic & 

trigonometric calculations . 

Has scales and a sliding indicator for finding coinciding points on the scale

Front DF CF C D 

Back CI D


Helpful for engineers scientists 

businesses and students . 

Fine craftsmanship made of Genuine 

Mahogany Wood Frame with celluloid 

laminated surface

Nickel metal side bars . 

Indicator slide curser made of metal 

rimmed thick genuine glass . 

Overall great vintage condition. Each 

side of indicator slide  is missing 1 tiny screw but it\'s still Functional - see pics . 

Imprinted numbers and markings are vivid.  Glass is clear. Indicator bar and center both slide easily .  

Made by Keuffel & Esser Company New York USA 

Useful RARE TO FIND collectible rule. 

Please feel free to message seller with any questions prior to offerding . 

Will be shipped with postal tracking 


Keuffel & Esser Co. Duplex Scientific Engineer Wood Antique Slide Rule c.1920s:
$12.99

Buy Now