The strict geometric shape and the high quality of the workmanship make this lamp a timeless design classic even after decades. The three opal glass balls each have a diameter of 12.5 cm. The sockets are suitable for E27 bulbs. 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.