Presuming its a 1970s piece, because this modernist table lamp on eBay certainly has the look of that era.
The seller doesn't offer much in terms of specifics on the design, just that it is sometimes attributed to Hans Agne Jacobsen – but you probably want to make your own judgement on that.
Or simply look at the photos of this really stylish light, with a metal base and plastic shade that rests on the base. According to the seller, he metal blinds 'diffuse the light perfectly' too.
it stands around 42cm in height and is described as being in 'good condition' and working, with only some small scratches on the shade and base but nothing that catches the eye.
The price right now is just one pence.