The lamp, designed by angelo lelii, is made of brass with a marble base and frosted glass diffusers. the design of the small glass cup containing the glass diffusers is very nice, as is the detail of the central joint and the lenticular base. the lamp is published on page 309 of the book "arredoluce catalogo ragionato 1943-1987" by a. Pansera, a. Padoan and a. Palmaghini for silvanaeditoriale. 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.