Industrial Grey Enamel Factory Pendant Lamp from Philips, 1960s

Industrial light grey enamel factory pendant light made by Philips in Netherlands during the 1960s. White enamel inside the shade. Iron top. Porcelain socket requires standard E 27/ E26 light bulbs. New wire. Fully functional. The weight of the lamp is 2,4 kg.The diameter is 45 cm. 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