Vtg 1930s Stereoview KEYSTONE Junior Stereograph , 100+ Photo Cards (Set2)

vintage Keystone View Company stereoscope viewer, a "Junior" model, used for viewing stereoscopic cards to create a 3D effect. Type: Keystone View Company Stereoscope Viewer Used to view stereoviews or stereograph cards, which are pairs of nearly identical images, to create a three-dimensional illusion. Era: These viewers were popular in the late 19th and early 20th centuries, with Keystone producing models like the "Junior" around 1933. There are over 100 card from various locations.