Belgian scroll was one of 3 tiaras JC brought with her. Back in the day it was common enough for a royal bride to bring a tiara or two, often gifts, to a marriage. The scroll was a gift from a French bank. The Congo diamond necklace (a gift from the colony) and the saphhire bracelet tiara was a gift from the Belgian nobility.
Luxarazzi: Luxarazzi 101: Sapphire Bracelet Tiara
Luxarazzi: Luxarazzi 101: the Congo Diamond Necklace Tiara
JC seems to be the source of a few others. She had other jewelry turned into tiaras over time. The family certainly has an impessive collection.
All in all, the scroll is likely one if not my favorite of the family.