~VERY GOOD ELECTRUM PROTRACTOR-K&E, NY~

~VERY GOOD ELECTRUM PROTRACTOR-K&E, NY~

$250 USD (200 GBP) postage included

A very good electrum metal rectangular protractor with English and American scales & conversions

Dimensions

8 x 4 inches

Circa

1900

Maker

Keuffel and Esser

Country of manufacture

North America

Categories: Calculating, Drawing Instruments, Scales Weights & Measures, Engineering antiques, Office Antiques

Description

A very good 6/7 inch electrum metal rectangular protractor with fully divided scales for degrees, inches, minutes, etc. 

Both English (Gunter) and American scales and conversions chart in lid of the pine, hinged case. End bruises on protractor (2 corners), otherwise fine and legible scales. Made/Patented by Keuffel and Essex of NY. Designed by George T. Keith. 

A most unusual instrument. Case measures 8 x 4 x 1/2 thick.

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CA ScientificaOpticae

Scientifica Opticae

Mark Hacking (Scientifica Opticae Inc.) has been an avid collector/dealer for over 30 years. A former Science teacher, he has an innate love for anything natural or mechanical. Specializing in optical (microscopes, telescopes), surveying, medical, weighing and drawing instruments, he is an active participant of the Scientific Instrument Fair in London. Living in Stratford, Ontario, Canada, with his wife and two children; Mark looks forward to meeting as many fellow collectors as possible, and has a worldwide following on eBay (Sciopti).

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