IMPERIAL STEREOSCOPE APPARATUS Viewer metallic bags for stereo photos of 3 x 7 cm (Catalog NPG). Made around 1900 by"" Neue Gesellschaft Photographische A.G."" . Steglitz, Berlin. This is the 2nd improved model in which the image carrier is mobile, ie focusable. To this apparatus were available different series with 25 images each. The viewer was also used for advertising purposes, with which images were used partially related to the product. See also Suchard Milka (chocolate and cocoa), Sulima (cigarettes), DÜRKOPP (bicycles, cars, sewing machines), Gulden BIE (coffee and tea), Grunfeld (linen and laundry), Salfeld (glasses witch Harz , drinks) and others. Measures Viewer / Glass 3x7
