In the thread further down I think it was said that Princess Viggo's spike tiara eventually went to Countess Karin of Rosenborg. That's entirely possible. But then I can't help wonder about the provenance of this spike tiara worn by Countess Jane of Rosenborg, first wife of Count Axel of Rosenborg:
I am not sure if it's the same tiara worn in this photo by Axel's second wife, Countess Jutta: