This Kegle model pendant was designed by Bent Karlby and produced by from Lyfa in Denmark in the 1960s. It is made of brass and is adjustable using the egg-shaped pulley. 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.