The collets from the King, are worne as single necklace and later also: only on the front side as double row!!!! - on the back site she use the sautoir as flat extensions I had wrote it on the website. Well you see it on the picture on the left on top: https://royal-magazin.de/england/kent/kent-tiara-pearl-diamonds-bracelet.htm
It is later only one collet necklace are in the family as base of the tiara.