A Hand-Held Monocular Panoramic Viewer
C. 1890, French, unsigned but probably by Unis, Paris, large single lens to front for viewing single images; Reference: For a similar instrument see Paul Wing 'Stereoscopes, The First One Hundred Years' p.205
C. 1890, French, unsigned but probably by Unis, Paris, large single lens to front for viewing single images; Reference: For a similar instrument see Paul Wing 'Stereoscopes, The First One Hundred Years' p.205
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