Dufaycolor Electric Slide Viewer, by Dufaycolor, British, Mid 20th Century

Metal box shaped like the roof of a house, open on one side and with a large square glass window on the other side that has a card frame attached with cloth tape. Inside there is a three-sided trapezoid-shaped box with a socket for a bulb in one end, facing the window. Attached to the socket is a long fabric-covered cable with a Bakelite plug at the other end. Exterior surfaces are enamelled.