A copy of Stephen Hawking s doctorate thesis signed in a shaky hand was the highlight of an auction of the British physicist s personal items in London, which raised almost £1.4 million ($1.8 million, 1.6 million euros).
As previously reported, the stroller, and many other things scientific figure, was presented in the form of lots on the popular auction Christie's.
Hawking's red chair was among one of the earliest wheelchairs he used after he was diagnosed with amyotrophic lateral sclerosis (ALS).
Medals and awards sold for 296,750 pounds ($387,708), compared with an estimate of 15,000 pounds, while the red motorised wheelchair sold for 296,750 pounds ($387,708), also compared with an estimate of 15,000 pounds.
The wheelchair raised $387,480 (£296,750), nearly 20 times more than pre-auction estimates of up to $19,500 (£15,000).
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Originally given just two years to live, Hawking lived for 55 years following his diagnosis, using a wheelchair for the vast majority of his life, before his death on March 14 at 76.
When Cambridge finally made Hawking's thesis available to download in 2017, it was viewed more than 60,000 times in 24 hours and public interest completely crashed the university's server.
Among the items was Hawking's motorized wheelchair, used in the 1980s and 1990s.
The Simpsons script, meanwhile, was sold for around $8,100. His various medals and awards raised a total of £296,750 or about $390,000.
Those items included a black bomber jacket, the script from an episode of The Simpsons on which he appeared and a 1988 copy of his best-selling book, A Brief History of Time, marked with his thumbprint as a signature.
"The sale gave admirers of his work the chance to acquire a memento of our father's extraordinary life in the shape of a small selection of evocative and fascinating items", she added.