The lamp series S1 was designed by Rosmarie and Rico Baltensweiler in 1969 and manufactured in their own company. The lamp can be used in many different positions, from the desk lamp to indirect accumulation. 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.