Published in: F. Deboni, Fontana Arte: Gio Ponti, Pietro Chiesa, Max Ingrand, f. 42, Allemandi, 2012. I have official proof of authenticity such as vintage catalogs, designer records, or other literature sources 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.