Vintage Stereograph and Stereographic Cards This is being sold as a set. This lot includes (1) Stereograph in good condition There is some age wear but it works great. Adjustable handle. (1) Setreographic Library Tour of The World Vol. 1 Published by Keystone View Co. (not sure if this is the full set of cards) This is an interesting and fun way to learn about past photography and picture viewing practices. Weight: 2lbs 11.25in long History: Stereographs, an early form of three-dimensional photograph, were a major vehicle for popular education and entertainment in the latter part of the nineteenth century. Stereographs are made with two almost identical photographs, side by side, to be viewed with a stereoscope. When viewed through a stereoscope, the photograph appeared three-dimensional, an awe-inspiring illusion for anyone during that time.