A copy of Stephen Hawking's doctorate signed with a trembling hand was the main attraction of the private physician auction in London, which raised almost 1.4 million pounds.
A copy, one of only five originals entitled "Properties of the expanding universes", destroyed the pre-sales expectations four times to sell for £ 5,848 750 for Christie's sale, which ended on Thursday.
Red leather wheelchair used by Hawking from the late 80s to the mid-90s, powered by a joystick, sold for £ 26,750, and the early edition of his best-selling book A short history of time marked with a thumb, the cost of which was GBP 68 750.
Hawking published his thesis in 1965, two years after the diagnosis of amyotrophic lateral sclerosis (ALS), a form of motor-neuronal disease that eventually led to paralysis.
His first wife Jane wrote 117 pages, but added two handwritten signatures and the words "This dissertation is my original work" in the front, as well as several mathematical equations in the middle.
When the document was made available online last year by Cambridge University, where Hawking spent his career, he was so popular that he broke the site.
The collection of his medals and prizes, including honorary awards from the Royal Astronomical Society, was sold for £ 296.750, and the entire collection reached £ 1,380.625.