Indeed it seems to be part of the Frisian head dress which is part of the traditional Frisian Costume Wilhelmina received on the same occasion. Although for the Young Queen a diamond studded version was made! This or a almost similar head ornament was exhibited at Het Loo Palace last year: "Oranje en streekdrachten" or "The House of Orange and National Costumes" Found a picture on the web from the exhibit for comparison.
--Previous Message-- : Difficult to say. Perhaps we can find a better : photo. : : --Previous Message-- : Would I be wrong in assuming that in Sal's : photo, the young Queen wears this stunning : piece on her forehead? : : --Previous Message-- : She also received a traditional Frisian : costume with matching gold jewelry. : : Message-- : In the online photo archive of the city of : Leewarden I stumbled on this remarkable : image of a stunning Diamond Aigrette or Head : Ornament by jeweller H. Adema that was : offered to Queen Wilhelmina on the occassion : of her visit to Leeuwarden in 1892. Queen : Wilhelmina was only 12 years old at the : time. Current whereabouts is unknown but I : guess in the Royal vaults. : : : : : : : : : :