Historical information
Stereoscopes work on the principle of viewing left and right eye images of the same image and in the process having the image appear as 3 dimensional. The have been popular since the middle of the 19th century.
Significance
The Holmes version of this object was manufactured cheaply and became widely available, hence it is an object with which many people would be familiar.
Physical description
Wooden oval shaped with glass viewing inserts. Extension in cross shape with wire brackets either side.
