It's a modern piece, but you perhaps wouldn't be surprised if we flagged this up as a 1960s design. It has that Panton-esque feel about it. If that's not enough, the lamp is made of chrome-plated pressed steel, creating a mirrored / reflective effect, allowing it to take on the 'tone and characteristics' of its surroundings.
Not cheap at £420, but a future classic for sure.
Update: There are also ceiling and floor versions of the design at the Tom Dixon website.