Originally designed in the 1926, a few limited productions of the design were manufactured in the 1970s. This particular lamp is a very rare 1970s production that was the most faithful to the original series of only 8 lamps that were made. This version has wooden black and white sections (like the original). It has a screwed in metal plate around the two switches (like the original) and a cleaner top edge (without a plastic protector shield that some versions have). Literature: van Ravesteyn architect; Kees Rouw, Nai010 uitgevers/publishers, 2014 pp.59 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.