Viewer with lens set at top of tube

Made:
1831-1870
Viewer with lens set at top of tube, two windows at the side

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Viewer with lens set at top of tube, two windows at the side
Science Museum Group
© The Board of Trustees of the Science Museum

Viewer with lens set at top of tube, two windows at the side, and fitting collar which can hold it in cannister, English, mid 19th century