I think princess Maud is wearing the missing necklace as a tiara. In the drawing of her wedding gifts it says that this necklace is convertible into a tiara.
--Previous Message-- : Fun attire! Is there a matching bracelet : attached to the bodice in addition to the : circle necklace? It seems too many and too : small elements. : : And just to introduce myself: Long-time : reader of this board, costume historian with : a focus on jewellery, not particularly well : informed on royal collections, but maybe : occasionally able to add something from an : historical point of view. Hello everyone! :