This lens is for use on 8mm motion picture cameras, and has a "D" threaded mount for attaching to the camera body.  It has a through-the-lens viewfinder which can pivot 180° parallel to the lens.  The zoom focal length is manually controlled by a hand lever from 10 to 30 meters.  The lens appears to be clear and free of fungus or haze, and operates smoothly over the zoom range.  It includes a sun hood threaded into the end of the lens.  Cosmetically, there are no indications of any damage or scratches, etc., on the exterior of the lens assembly.