Hola published an interesting article about this theme. Here is a rough translation of the article. (
I am sorry for any mistake in the translation, I have no time to check it...)
All babies born in the Dutch Royal Family in the last century worn this brooch the day of their baptism
Allthough many baptismal traditions of Dutch Royal Family have been changed through the years, others, as the christening gown and the historical brooch that wears the new born during the religious ceremony, have remained unalterable in the successive generations of the Orange Family.
In a spontenous ceremony, like her older sister, princess Catherine-Amalia, the small Alexia was baptized with water of the Jordán river and the familiar gown. A precious christening gown, that was made specially for the baptism of Queen Guillermina, in 1880, with embroidery of Brussels. The dress has been used in the last years for the baptisms of Queen Juliana and Queen Beatrix - respectively great-grandmother and grandmother of the neophyte -; her father, prince Guillermo; her uncle Friso and Constantino and, for the last time, as we said by her sister and future Heiress to the throne of Holland, princess Catherine-Amalia. And, showing the historical brooch- a dove of white gold and brilliants taken before by all their predecessors.
Traditions apart, everyone can see how intimate and sponteaneous these cerimonies are at the kingdom of Holland. Thus, the baptism of princess Alexia could be said that was touching, very pleasant and, also,
moved enough: the protagonist of the day was smiling during all the celebration, as well as playing with her mother's brooch; princess Catherine-Amalia, older sister of the litle one, was hardly quiet and, even, in a pair of occasions, rose of her seat and began to cross the central corridor of the temple, without paying attention to princess Maxima who indicated with gestures to return to her place; her greater cousin, Eloísa, who looked a young lady, was very proud of the small purse with which she attended the celebration; the Choir of Children dedicated a charming song to litle Alexia and offered her and her sister with two bibles; without forgetting, personal desires of the godparents. Specially, the sweet words of princess Mathilde to Alexia and, also, Amalia.