Large graphoscope with dimensions when closed of 16 x 9 1/2 x 4 1/2 inches. With a 61/2 inch diameter viewing lens. Fitted with stereo lenses in opera glass mount and with rack and pinion focusing. Of the folding Brewster type viewer for stereoslides. The lid with mirror is missing. Veneered and inlaid with makers mark of a star on the support strut.