In 2012 Piguet auction house, of Geneva, sold a number of objects from the collection of Queen Victoria Eugénie of Spain, mostly orders and medals, but also an extensive collection of fans. It was the first time I had seen so many royal fans being sold publicly.
See the following pages for more information:
https://www.piguet.com/fr/lots/68445
https://www.piguet.com/fr/lots/68446
https://www.piguet.com/fr/lots/68447
https://www.piguet.com/fr/lots/68448
https://www.piguet.com/fr/lots/68449
Lot 49 was a beautiful scale (tortoise shell ?) fan, with lace leaf and a diamond monogramm applied to the guard:
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