You seem to be correct Beth! The images I found of the alleged Marchioness of Abergavenny's Tiara were from cursory google searches, which I thought might be an interesting lead on Lady Anne's Tiara! In fact, I came across them after finding out the Marchioness had been given an Austrian Order during the Queen's State Visit to Austria in 1969, and tried to find her Tiara (I was not entirely successful)!


I do have some more pictures of the Tennant/Glenconner Tiara, which was worn by Lady Glenconner for a picture in the 1980s, which I shared a few months ago on here! I also found an image of her wearing three of the stars as brooches like the image you shared!

I'm now quite intrigued by Lady Glenconner's earrings, which she has worn for almost all of her evening events for decades! I wonder if they were gifts from her parents or her in-laws? and if they have a family provenance?