My scanner is acting up tonight, so bear with me here...in the latest issue of Majesty Magazine there is a great spread on the Devonshire House Ball with many great photos. Page 30, there is a photo of Prince and Princess Carl with Princess Victoria.
Victoria appears to be wearing the alternate setting of the pearl and diamond tiara given to the Maud as a wedding gift from their parents, while the tiara's central element is being used by Maud as a stomacher.
If this is the case, is there anything known about the tiara Maud is wearing?