It was my understanding that the diadem of the Wedding Gift Parure 1901 was dismantled because it was the wish of the Queen and the Prince to give personal bijoux to the four Princesses, when they became around 18.
That was all before 1962. Besides that the diadem was thought unwearable and never seen in real apart from state portraits. The bracelet on the contrary was very often worn by Queen Juliana.
I will seach for the e-mail of Els Smit and ask her.