Hot Old witch hat lamp. Probably from SIS

This beautiful and large table lamp is made by probably SIS Germany in the 50s.
The yellow aluminum lampshade is colored with the typical shrink color of the 1950s. The white cast steel base is also painted with this technique. In between in a handy long gooseneck that can go in all directions.
Dimensions:
Height - 43.5 cm. / 17.1 inches.
Lampshade - 17.2 cm / 6.8 inches.
Base - 15 x 9 cm hot. / 5.9 x 3.5 inches.
The lamp shows stronger signs of use, the shade at the top is somewhat deformed as seen in the picture. There are three defects in the paint on the foot. The brass from the gooseneck has tarnished. But it works great and makes a very pleasant light.