Purple lamp 60s

Cool table lamp from the mid-century of the 60s. Nice purple lampshade and base, combined with a brass gooseneck arm. The lampshade has small holes drilled along the edge, which gives a nice bright effect when lit. The lamp is a design by the Dutch company Hala Zeist. It is about 30 centimeters (about 12") high. It is in good condition, with some very small traces of use. See photos.