This lamp was designed by Otto Wagner as lighting for the hospital room. As part of the ongoing renovations they all lost - except for this one! Mount earthenware (screw) The original wiring can be renewed 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.