The sold chair was the "earliest preserved example" for a chair Hawking used after being paralyzed, announced Christie's.
Hawking used this chair from the late eighties of the last century to the mid-nineties until he could no longer handle the chair by hand.
The wheelchair was sold as collectibles, not for medical use. Revenue from the sale will be donated to two charity foundations – the Stevens Hawking Foundation and the Motoro Neuron Diseases Association.
In his 1966 edition of the University of Cambridge, Hawking's original doctoral dissertation was sold for $ 767,000 (675,500) at the same auction on the Internet. Other items, including his extinguisher, were auctioned for a total of $ 650,000 (572,450 euros).
At the auction, which included Aizek Newton, Charles Darwin and Albert Einstein, 52 items were sold. Their total price exceeded $ 2.3 million (two million euros).
Houghton, 21, was diagnosed with amyotrophic lateral sclerosis, which meant that he could only move with a wheelchair, but later lost his ability to speak. Despite serious illness, Hawking was actively engaged in scientific and social life. He died March 14 this year, at the age of 76 in his home in Cambridge.