Queen Elizabeth II At A Polo Match [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) — see more

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)

Popperfoto Ray Bellisario/Popperfoto