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The unveiling of the new Tyrrell P34 in presence of British Formula One racing driver Jackie Stewart at the Heathrow Hotel, London, UK, 19th September 1975. (Photo by Evening Standard/Hulton Archive/Getty Images)

The unveiling of the new Tyrrell P34 in presence of British Formula One racing driver Jackie Stewart at the Heathrow Hotel, London, UK, 19th September 1975. (Photo by Evening Standard/Hulton Archive/Getty Images)