This lamp was originally designed by josef hoffmann for the country house 'ast' in carinthia, later he used this simpler and clear design in the 1950s. here it is a smaller version with 5 arms. base e 27. 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, up to 250v (europe/uk standard).the wiring of this item may be original and might need replacement, if not specified otherwise.