The Prince Of Wales & Duchess Of Cornwall Attend Royal Mail Reception To Mark 500th Anniversary Of The Postal Service [Getty Images]

LONDON, LONDON - SEPTEMBER 06: Camilla, Duchess of Cornwall examines a Penfold Postbox she just unveiled as she attends a reception to mark the 500th Anniversary of the Royal Mail at Merchant Taylor's Hall at on September 6, 2016 in London, England. (Photo by Chris Jackson - WPA Pool/Getty Images)

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