Rowsell's Patenet Graphoscope.Large stereo-graphoscope for prints, transparencies and stereographs. 160mm diameter lens; stereo lenses on fold-down panel. With two loose bone stoppers. Overall (deployed): 380 mm x 290 mm x 585 mm. Rowsell's Patent Graphoscope
Z form stereographoscope. 13cm diameter bi-convex lens. Two 35mm diameter biconvex stereolenses. Sliding print holder. Supported on two brass rods. Support foot missing. Stereo-Graphoscope
