In these books (and in various interviews as well) the couple have stated that this - second - meeting at Kronberg was when they really fell in love. There surely must have been mutual attraction a month earlier
Not forgetting this is a Jewel Board I add a picture here of the couple at the time of their official engagement & where we can clearly see how regal Princess Benedikte wears her jewelry
--Previous Message-- I thought they met the 10th of march 1966 when Beatrix married Claus.