Details
A 19th-Century brass dipleidoscope,
by Dent, No. 38560, the cover engraved DENT Patent Meridian Instrument, 61, Strand, London, 38560, the prism mounted on a circular base with three adjusting screws, with additional telescope located on an arm, mounted on an iron bracket for wall fixing, and contained in a teak case (the case not original) -- 11½in. (29.2cm.) wide

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