Bibliography Ugo la Pietra, “Gio Ponti”, Rizzoli, Milan, 2009, p. 344 Giuliana Gramigna, Repertoire of Italian design, 1950-2000 per l’arredamento domestico, vol. I and II. 1 and 2, Humberto Allemandi, Turin, 2003, p 165. 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.