This wall or ceiling light is produced by Staff Leuchten (Germany). They are made of thick structure glass and have 3 sockets for E27 (a led lamp with a E27 size can be used). They are easily mounted on the ceiling or the wall, because the glass can be adjusted to the lamp with neat little screws. 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.