: As far as i remember it was once posted here : on this Board that this tiara was inherited : by Prince GHeorg and he sold it in the : 1980's.
According to Trond Norén Isaksen, he was told by Countess Ruth of Rosenborg herself that she had never worn this tiara, and that upon Princess Margaretha’s death it was inherited by her eldest son, Prince Georg, who sold it off. http://trondni.blogspot.fr/2010/05/royal-jewels-princess-margarethas.html
Anyway, thank you very much, Kasper, for these pictures.