This is a model type with a lens Rowsell grafoscopio. Mahogany. These are based on the patent of 1864 Charles John Rowsell, have a platform hinged at the base, on the front there are two lenses for stereo use are hinged to lie flat on the platform when not in use, a lens a hinged grafoscopio from below the platform to the viewing position. At the rear of the platform is a portafotos with hinges and a diffusing screen for transparencies. The assembly is folded up when not used.
