The luminaire has a polished brass base to achieve a special light reflection. Polished surface. The luminaire has been rewired according to current safety standards and can be used in the USA and all other countries around the world. All types of light sources 2xE27 porcelain lamp socket can be used (LED, energy-saving lamps, etc.). This piece is attributed to the mentioned designer/maker. It has no attribution mark and no official proof of authenticity, however it is well documented in design history. I 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.