Known as a model from Atrax Kubische Leuchten Berlin. Imported or produced by the firm Rudolf Blik (Rubli) in The Hague. Slight traces of the Rubli trademark on the glass shade. Pictured in various Atrax Berlin and Thabur/Rubli catalogues This piece has an attribution mark, I am sure that it is completely authentic and take full responsibility for any authenticity issues arising from misattribution, Up to 250V (Europe/UK Standard).The wiring of this item may be original and might need replacement, if not specified otherwise.