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Lot 646
A 19th Century brass Spectrometer by John Browning, London, complete with telescope and collimator
A 19th Century brass Spectrometer by John Browning, London, complete with telescope and collimator mounted above a circle of degrees with magnifie...
Lot 647
A late 19th Century lacquered brass monocular microscope by J.H. Steward, 406 Strand, London, with
A late 19th Century lacquered brass monocular microscope by J.H. Steward, 406 Strand, London, with rack and pinion focusing and plano-concave mirr...
Lot 649
A 19th Century Negretti & Zambra, 45 Cornhill and 122 Regent Street, London, single lens lacquered
A 19th Century Negretti & Zambra, 45 Cornhill and 122 Regent Street, London, single lens lacquered brass microscope, 7.5ins high (extended), in or...
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