Description
A good example of a Keuffel and Esser Slide rule in all original packaging. Patented 5 June 1900, and in excellent condition
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Dealer information
Fletcher
Fletcher Wallis
Fletcher Wallis sells objects and books relating to the history of science, medicine and technology Arcade. He publishes books through Vernier Press, including Antique Medicine Chests, and Corkscrew Patents from 1795. He has been dealing for forty eight years.