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"Benjamin Stancliffe is first listed in the Philadelphia, Pennsylvania directories in 1817 as an optician, philosophical and mathematical instrument maker. He is last listed in 1833. Stancliffe was born in 1782 and died in 1834." Reference: Smart, Charles E. The Makers Of Surveying Instruments In America Since 1700 Troy, New York: Regal Art Press. 1962
Instrument shown is from the collection of the National Museum of American History, a division of the Smithsonian Institution
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