Historical information
This is a wood stereoviewer with folding handle The viewer has two lenses at a set distance in the wooden hood which is lined in green velvet. The pictures can be moved vertically on the slide holder in order to focus them. These devices became popular in the middle of the 19th century. This is probably a Holmes type stereoscope, named after its inventor, Oliver Wendell Holmes (1860).
Physical description
Velvet lined view mask with engravwed patterns. Frame is silky oak wood with a handle underneath.
