Pair of Pistillo model by Studio tetrarch for Valenti Luce and dating back to the 60. No ball is missing. The structure is made of chromed plastic. There is a slight difference in hue between chrome sconces but inconspicuous. No discomfort level deco. Some small bites chrome visible on the detail photos. A pair of sconces design which unmistakably mark your interior. This piece has an attribution mark, I am sure that it is completely authentic and take full responsibility for any authenticity issues arising from misattribution, European Plug (up to 250V).The wiring of this item may be original and might need replacement, if not specified otherwise.