Zeiss ikon mercury mirror glass flush mount by adolf meyer metal top diamter ceiling plate 110 mm / 4.3” e27 / e26. All lamps have been made suitable by international standards for incandescent light bulbs, energy-efficient and led bulbs, e26/e27 bulb holders and new 110 volt or 220 volt wiring are ul listed or ce certified, 100% safe this piece has an attribution mark, i am sure that it is completely authentic 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.