There is reference to this tiara on Dinastas.
"Headband with flowers seven black or gray and bright pearls, 14500 pesetas, which joined Fork with a black pearl, valued at 2500 pesetas, because it helped to fasten it to the hairstyle. This diadem was inherited by the Infanta Beatriz, there is a photo with her, and the flowers remain as brooches her descendants."
Also available here is a summary of the collection of Queen Maria Christina inherited by her son (I believe this does not include items given to her daughters' descendants) and the current whereabouts, where it can be identified.
"Diademas / Tiaras
Headband with 15 brightly trimmed flowers, valued at 11,000 pesetas is the diadem given to Emmanuela Dampierre
Headband enriched with 27 pearls and brilliant, valued at 28,000 pesetas the headband of the Countess of Barcelona, held by the royal house.
Headband with a design based on three bright leaves, 12500 pesetas
Headbands with 14 garnets and diamonds, valued at 1250 pesetas.
Headband with flowers seven black or gray and bright pearls, 14500 pesetas, which joined Fork with a black pearl, valued at 2500 pesetas, because it helped to fasten it to the hairstyle. This diadem was inherited by the Infanta Beatriz, there is a photo with her, and the flowers remain as brooches her descendants.
In addition, 161 lots were awarded to the king, including:
1. Necklace with 48 chats priced at 90,000 pesetas. This necklace was the one given to the Countess of Barcelona.
2. Necklace with 38 chatones, 40,000 pesetas. This must be one of those worn by Queen Victoria Eugenia, who completed with the ones she owned.
3. Two pearl necklaces, 156,000 pesetas. they must be the natural Pearl necklaces that the Infanta Pilar possesses and another that the Infanta Margarita possesses and that Queen Maria Cristina frequently wore.
4. Necklace with 113 pearls, 74,000 pesetas
5. Necklace with 147 pearls, 40,000 pesetas
6. Necklace with 187 pearls and one on the clasp, 14,500 pesetas
7. Bracelet with three strands of 66 pearls and pearl brooch surrounded by diamonds, 12500 pesetas. Queen Sofia has a bracelet of these characteristics inherited from Queen Victoria Eugenia, next to the earrings of the wedding of Infanta Elena and a matching ring.
8. Brooch with rectangular emerald and double border of diamonds, this is the brooch of the Infanta Pilar, which comes from Queen Elizabeth II, which they bought at auction.
9. Wide shaped brooch set in bright, 3750 pesetas. It is among the wedding gifts of the Countess of Barcelona
10. 8 round brooches with diamonds, 3000 pesetas.
11. Three brooch-shaped brooches, 3750 pesetas.
12. Three flowers with emeralds and brilliant, 16,000 pesetas.
13. Brooch in the form of a loop with hexagonal emerald and diamonds, 2500 pesetas.
14. Brooch with sapphire in cabochon and two shining edges, 10000 pesetas.
15. Pearl brooch surrounded by brilliants and another pearl knob suspended from it with a rose cap, 4250 pesetas. owned by Queen Sofia, made by ansorena, worn by Queen Letizia, on October 12, 2017
16. An emerald in the form of a knob suspended from three bright, 40,000 pesetas.
17. Two bracelets articulated with emeralds and brilliant, 14500 pesetas.
18. Another articulated bracelet, 4500 pesetas.
19. Another hoop with a black pearl surrounded by diamonds, 9300 pesetas
20. Necklace with ten pieces of sapphires surrounded by diamonds and links of diamonds, 15,000 pesetas. worn by Emmanuela Dampierre, and sold a few years ago, which could be disassembled
21. Chain necklace with 31 links of diamonds, 15,000 pesetas. gifted to Emmanuela Dampierre, worn as two bracelets
22. 19 loose sapphires, 7250 pesetas those of the Infanta Pilar
23. A pendant with a large pear-shaped ruby and brilliant ornament, 12,000 pesetas
24. Two necklaces of black pearls, 14250 pesetas
25. A chien necklace with twenty-one strands of pearls and a bar of brilliant 500 pesetas
26. Pair of earrings with hyacinths and diamonds, 200 pesetas"
(Please note I have used google translate)
I recently came across this advertisement for Ponds Cold cream in 1935.
Does anyone know anything about the Infanta's tiara? It is unknown to me.
The fact that she also did an advertisement for Pond's is interesting, as I didn't think the Spanish royal family, despite their exile, was so short of money that a Princess had to do advertisements.