In his blog Trond N. Isaksen states that Prince Gustav “lent it to his sister Princess Thyra and some of his nieces.” I know that Princess Thyra wore it at the pre-wedding of King Frederik and Queen Ingrid. But I have never seen any niece of Prince Gustav wearing Queen Josephine’s diamond tiara (apart from CP Märtha who inherited it later). Does anybody here know whom the author is refering too?