In an article a few years ago by Marianne Luban, Ms Luban suggested that the deep impression on the head of the mummy of the Lady Rai was caused by a headdress which was originally on Rai when her mummy was wrapped.
I had never noticed the deep mark seen on the mummy of Rai other royal mummies such as Queen Meryetamen and the Pharaoh Amenhotep II have clear impressions of hard jewels which had been left on either the skin or within the resin of the mummies.
While the mummy of Queen Inhapy has a large impression of a jewel on her face. Whether its a crown which slipped down off her head during her wrapping we may never know.
The comparison with the little mummy mask of Satdjehuty and its hair style with its gold (tiara?) was compelling as both women were at the same court and would have modelled the fashion of the queen, Great Kings wife Ahmes Nofretari.
Sadly the discovery of an intact burial of a third women of the same status and in this same court is unlikely.
I have also never encountered such a tiara in any museums collection or a comparable mask to that of Satdjehuty's in the British museum.
The three tiara's from Giza are old kingdom in date and stylistically different, while none of the middle kingdom princesses and queens who's jewels have survived has any such ornament even though the crowns of princess Khnumet are wonderful.
Very little royal jewelry has survived from the courts of the new kingdom, the exception being of course the jewels of Queen Ahhotep (II?) her mummy torn apart for them.
Perhaps in the end the question is more interesting than the answer could be.