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An English lacquered brass and ivory W. and S. Jones pattern portable compass microscope, unsigned, circa 1800 With turned ivory handle and opposing lens folding onto frame cut with sprung slot to take specimen slider, 9cm (3.5ins approx.) long open; 7cm (2.75ins) long closed, in original leather covered two-part sleeve case, 8.5cm (3.25ins) long overall; with another similar, unsigned probably mid to late 19th century, in leather slip case, 7cm (2.75ins) long overall; and a hand-held magnifier, unsigned, mid to late 19th century, with slender baluster-turned ivory handle, 7cm (2.75ins) approx. long, (3). The design of the first item in the current lot was published by W. & S. Jones in 1798. The partnership between the brothers William and Samuel Jones is recorded in Clifton, Gloria Directory of British Scientific Instrument Makers 1550-1851 as operating from several addresses in Holborn, London 1792-1859 (including 30 Holborn 1800-1860). A similar Instrument was sold in these rooms on Wednesday 16th February 2011 (lot 7) for £350 hammer.

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