A Peter Hope Boxwood Elapsed Time Slide Rule, English, circa 1840,
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A Peter Hope Boxwood Elapsed Time Slide Rule, English, circa 1840, stamped PETER HOPE 64 SEEL ST LIVERPOOL, with single slide and divided calendar and time scales; together with another boxwood slide rule copyrighted in 1889, with single slide and brass capped ends, the largest 26in (66cm) long (2) Footnotes: Exhibited: Scientific Instrument Society 25th anniversary exhibition, Museum of the History of Science, Oxford, 2008. (copyrighted 1889 slide rule) For further information on this lot please visit Bonhams.com For further information about this lot please visit the lot listing
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A Peter Hope Boxwood Elapsed Time Slide Rule, English, circa 1840,
Estimate £250 - £350
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