Modernist metal Bauhaus desk lamp, 1960s

An absolute rare and unusual desk lamp with perforated shade, rivets in metal. There are some remains of a early stamp or lettering at the bodem of the lamp ( please see pic ) but unfortunately unreadable ( if anyone does know what it used to say we would love to know ). We've attributed the lamp to the 60s but it could very well be earlier and there is also the possibility that the shade was added on later than the rest of the lamp as we have never seen anything like it. As can be seen the lamp is in great working condition and is fitted for general e27 lightbulbs.