Vintage Keystone King Size Projection Viewer Model V88 for a Film Projector

This vintage Keystone projector viewer is model V88. It was made as a way to view film movies without a large projector screen. The projector is pointed towards the side opening and mirrors reflect it upon the screen. It has a metal stand that extends out by twisting. This listing includes the viewer and printed off instructions only, does not include a projector. The viewer screen on the unit measures 7" wide by 5-1/4". The whole unit is 8.5x8.5x7 inches. The vintage condition is as shown in the photographs. Some surface marks and particulates inside.