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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Dealer information
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).