Item is a brown handheld electric view master first manufactured by Swayer's Inc and first introduced at the New York World Fair (1939-1940). Once pressed down the lever on the side of the viewer will rotate the reel one frame at a time once pressed. Unlike previous view masters, this view master comes with a built in back light attached to an electrical cord. Once turned on the back light illuminates transparencies on view. Item is made of plastic and metal. Reel has 7 diametrical, 16 mm colour transparencies of The Atlas of Human Anatomy, Head and Neck.