The jewelry which went ‘astray’, meaning to the Bernadotte side lines, is quite difficult to research... I think that the assumption is not too far-fetched that a lot got lost because it was sold after the various Princes lost their apanage along with their titles. At the 80th birthday gala for King Gustav V in 1938, Countess Elsa Bernadotte wore this - hard to tell if it's a central jewelry hair ornament / brooch on a fabric headband or a full tiara. Most likely the former, I'd say:
--Previous Message-- : If his first wife, countess Elsa von Rosen, : took most of the jewels, they must have gone : to her daugther Madeleine isn't it? :