Rare, Height-Adjustable Black Metal Lamp from the 1950s

Rare, height-adjustable black metal lamp from the 1950s with a very sleek and modern architecture. Who the designer or manufacturer is I don’t know, I only found a picture in a 1957 magazine showing this lamp in an interior. Unfortunately without any information. The lamp is still in véry good condition. No dents and an absolute minimum of traces of use. With a diffuser that is made of plastic. The height is as shown in the pictures.