Wooden box camera for 4 1/2 inch wide darkroom loaded rollfilm 3 1/2 x 4 1/2 inches. Fitted with a rapid rectilinear lens of fixed aperture. Rotary shutter cocked by film windon. T/I. And two reflecting finders. The film is transported by rotating the prism shaped wooden block, turned by the exterior wheel with belt drive to take up spool. The edges of the prism carry 5 points,, perforating the film and holding it securely. Each turn brings a new face with fresh film into the focal plane. The windon wheel transports the film, cocks the shutter and operates an exposure calculator. O Freiwirth.