This metal desk lamp was produced by Hillebrand company in Germany in the 1970s. It has a base diameter of 15 cm and a shade diameter of 16 cm. 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.