This desk lamp was produced by the exclusive lamp department at E. Tronconi. The lamp can be adjusted in height by turning the adjustment knob. The chromed diffuser gives the light a softer glow. 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.