Industrial pendant lamp by charles keller for zumtobel, 1990s

This industrial pendant lamp was designed by charles keller for zumtobel staff during the 1990s. It features a cast aluminum top and an aluminium shade, newly painted on red. New porcelain socket requires e27/ e26 light bulbs. New wire the diameter of the shade is 34 cm. It weighs 2.3 kg.