The chairs sold are "the earliest preserved examples" for the chair Hawking used after being paralyzed, announced Christie's.
Hawking used this chair from the end of the eighties of the last century to the mid-nineties until he could no longer handle the chair by hand.
The wheelchair is sold as a collector's item, not for medical purposes. Income from the sale will be donated to two charitable foundations – the Stevens Hawking Foundation and the Motoro Neuron Association.
In the 1966 edition of Cambridge University, Hawking's original doctoral dissertation sold for $ 767,000 (€ 675,500) at the same auction on the Internet. Other objects, including the blouse, are auctioned for a total of 650,000 dollars (572,450 euros).
At auction, which included Aizek Newton, Charles Darwin and Albert Einstein, 52 items were sold. Their total price exceeds 2.3 million dollars (two million euros).
Houghton, 21, was diagnosed with amyotrophic lateral sclerosis, which allowed him to move only in a wheelchair, but then lost his ability to speak. Despite suffering from serious illness, Hawking is actively involved in scientific and social life. He died on March 14 this year, at the age of 76 at his home in Cambridge.