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BONN, GERMANY - NOVEMBER 02: Diana, Princess of Wales, wearing a midnight blue velvet, off the shoulder evening gown designed by Victor Edelstein with the Spencer family tiara, and crescent shaped diamond and sapphire earrings, necklace and bracelet given to her by the Sultan of Oman, smiles as she attends a banquet on November 2, 1987 in Bonn, Germany. (Photo by Anwar Hussein/Getty Images)

BONN, GERMANY - NOVEMBER 02: Diana, Princess of Wales, wearing a midnight blue velvet, off the shoulder evening gown designed by Victor Edelstein with the Spencer family tiara, and crescent shaped diamond and sapphire earrings, necklace and bracelet given to her by the Sultan of Oman, smiles as she attends a banquet on November 2, 1987 in Bonn, Germany. (Photo by Anwar Hussein/Getty Images)