It might look fairly unassuming, but this is a British midcentury classic, the Antelope Chair by Ernest Race.
Back on the market 60 years after its first introduction, the Antelope Chair originally appeared on the terrace of the new Royal Festival Hall at the 1951 Festival of Britain and was said to be a compromise between English tradition and Scandinavian innovation.
The chair is made of welded steel rods, with wood used for the seating. Simple it is in construction, but that's not actually reflected in the price. One will set you back £505.