There is a very similar design by Verner Panton, but this is actually a 1960s Erjoka Moon ceiling light.
If you look close, you'll notice the differences between the two, but at a glance, this will pass as the real deal. It's made up of 10 circular concentric thin brushed aluminium slats secured on the top and the bottom by large metallic screws. The bulb casing is threaded through the top screw.
The beauty of those slats is the light effect you get on top of general illumination. The light is described as being 'in excellent condition' and in 'full working order'. If you want it, £2.20 is the price right now.