This well-designed floor lamp was produced by quality lighting firm Gebroeders Posthuma ('Gepo') from Amsterdam. The height is adjustable from the very top of the central support rod all the way down to the graceful three-pointed foot. 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.