ath
I too hope that mathilde will wear the spanish Wedding gift tiara. But as the imperial laides of Japan have only diamond tiaras i think Mathilde will not wear a tiara with coloured stones there.
Queen Fabiola wore the Spanish tiara though (and the Wolfers as a necklace) when she visited Japan in 1964.
https://www.youtube.com/watch?v=yZhytSHgy7E
I can't tell, however, which stones she wore it with, as the movie is black and white. I also wonder if it was one of the fake stone sets or if they had already been replaced with real ones.