Marie Valerie's sleeves date this to the middle 1890s, Elisabeth Franziska was born in 1892, Franz Karl in 1893, Hubert Salvator in 1894 while Hedwig was born in 1896, giving a wide interval in the middle 1890s where Marie Valerie could be photographed.
Posted to the Alexander Palace Time Machine Discussion Forum by KarlandZita on 1 November 2010.