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KIEL, GERMANY - MAY 22: Queen Elizabeth II wears the Russian Tiara at a banquet during an official tour of Germany. (Day date not certain, Tour dates 22-26 May 1978). (Photo by Tim Graham/Getty Images)

KIEL, GERMANY - MAY 22:  Queen Elizabeth II wears the Russian Tiara at a banquet during an official tour of Germany. (Day date not certain, Tour dates 22-26 May 1978).  (Photo by Tim Graham/Getty Images)