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Queen Elizabeth II at a polo match at Cowdray Park, Midhurst on 20th July 1969. (Photo by Ray Bellisario/Popperfoto via Getty Images/Getty Images)

Queen Elizabeth II at a polo match at Cowdray Park, Midhurst on 20th July 1969.  (Photo by Ray Bellisario/Popperfoto via Getty Images/Getty Images)