Casa Amica, November 1969, p. 47; Production catalog 1974, p. 45; G. Gramigna, Repertoire 1950-2000, Allemandi, 2003, p. 164. The lighting system can be adapted to US standards. 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.