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LONDON, ENGLAND - MAY 20: A Christie's employee holds running shoes worn by Sir Roger Bannister when he became the first man in history to run one mile in under 4 minutes, on May 20, 2015 in London, England. Forming part of the Out of the Ordinary auction on 10th September, they are expected to fetch between 30-50,000GBP (47-78,000USD - 42-70,000EUR). (Photo by Carl Court/Getty Images)

LONDON, ENGLAND - MAY 20:  A Christie's employee holds running shoes worn by Sir Roger Bannister when he became the first man in history to run one mile in under 4 minutes, on May 20, 2015 in London, England.  Forming part of the Out of the Ordinary auction on 10th September, they are expected to fetch between 30-50,000GBP (47-78,000USD - 42-70,000EUR).  (Photo by Carl Court/Getty Images)