You know, I was all set to agree with Lanie that this photo of Anastasia was taken in 1914, but the more I look, the more I'm not so sure:

Look at these shots of the 1914 dresses:


Three things stand out:
1. The beading extends all the way to the neckline
2. The neckline itself is wide and relatively low
3. The bodice forms a large, beaded square
The 1916 dresses, on the other hand, have different features.
1. Significantly narrower necklines
2. No beading along the upper edge
3. The bodices form a sort of cross-over, triangular shape between the bust and the waist


I think Anastasia's dress in the "mystery photo" conforms more closely to the 1916 style. Thoughts, anyone?