Abstract: A collapsible stereoscopic slide viewer is comprised of top, bottom and side walls, a rear wall with viewing apertures therein, a front wall having a pair of light-admitting apertures therein and a lateral filmstrip-receiving channel formed outwardly proximate thereto, the side, rear and front walls being formed from a continuous lateral array; the viewer having offset viewing and light-admitting apertures permitting alternative viewing of two lateral series of stereographic slides disposed on a single filmstrip. A filmstrip holder for retaining laterally disposed stereographic images for use with the viewer is also disclosed. Blanks suitable for assembling the viewer and filmstrip holder are similarly described.

Abstract: A collapsible stereoscopic viewer is comprised of a front wall having light-admitting openings therein; a rear wall assembly having coincident viewing apertures therein; top and bottom walls joining the front and rear walls; and, side walls which include continuous extensions for forming a channel proximate the front wall whereby a sterescopic film strip may be received therein. Blanks suitable for assembling the viewer are also described.

Abstract: A collapsible optical viewer is comprised of a front wall having a light-admitting opening therein; a rear wall assembly having a coincident viewing aperture therein; top and bottom walls contiguous with the front and rear walls; and, side walls, one of which includes a continuous extension for forming a channel proximate the front wall whereby a photographic film strip may be received therein. A blank suitable for assembling the viewer is also described.

Abstract: A collapsible stereoscopic viewer is comprised of a front wall having light-admitting openings therein; a rear wall assembly having coincident viewing apertures therein; top and bottom walls contiguous with the front and rear walls; and, side walls which include continuous extensions for forming a channel proximate the front wall whereby a stereoscopic film strip may be received therein. A film strip holder for retaining and accurately positioning a pair of photographic film strips is also disclosed. Blanks suitable for assemblying both the viewer and film strip holder are similarly described.

Abstract: A collapsible stereoscopic viewer is comprised of a front wall having light-admitting openings therein; a rear wall assembly having coincident viewing apertures therein; top and bottom walls contiguous with the front and rear walls; and, side walls which include continuous extensions for forming a channel proximate the front wall whereby a stereoscopic film strip may be received therein. A film strip holder for retaining and accurately positioning a pair of photographic film strips is also disclosed. Blanks suitable for assembling both the viewer and film strip holder are similarly described.