Item is a stereoscopic box set and comes with one collapsible black hoodless stereoscope and 53 silver gelatin stereographs of Midnight Sun North-Cape and The Norwegian Fjords. This object was used to view two nearly identical photographs, or stereographs, as one three dimensional image. The stereograph would be placed in the sliding card holder and adjusted to fit the user's vision until the two images overlap to mimic a three-dimensional effect. Associated with the Stella Polaris cruising ship. Written on object: Original Indupor Patent Made In Germany.