1908 Princess Eitel-Friedrich von Preussen
From eBay.
This photo shows Sophie's dress has a train draped from her shoulders that contributes to the fullness of the back of her dress.
Keywords: 1908, Princess Eitel-Fritz, Princess, Oldenburg family, Hohenzollern family, German, straight coiffure, feathered hat, high enclosing neckline, vest, elbow length upper close sleeves, blouson bodice, train, close skirt, bustle, earrings, bracelets, pin