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Princess Margaretha (wearing the Four-Button Tiara) and Princess Desiree (in Queen Louise’s Tiara) of Sweden are joined by their respective fiancés, John Ambler and Baron Niclas Silfverschiöld, as they attend the biannual Amaranther Ball, for the Grand Order of the Amaranth, in Stockholm on this day in 1964, a few months before their weddings.