Small compact projector with slide changer or film strip holder, tripod thread on the underside ( ¼ ´´ ), base and front made of Bakelite, 100W lamp for cine fitting, glass-reflector, rotating front, lens: Hektor f/2.5 85mm, interchangeable three-lens condenser, varying accord-to projection lens used,Dimensions: LxWxH: 6 1/4 ´´x 3´´ x 6 1/4´´  weight: 3 1/2 lbs. without lens,