The dress can be made, quite accurately, by following this pattern:http://www.simplicity.com/dv1_v4.cfm?design=6675
"New Look 6675"
The only alteration that would need to be made, is to extend the middle bodice into the full length, rather then stopping at the waistline.
Although I must admit, not easily. There appear to be quite a few layers involved. It could be simplified into two pieces: the under-dress [the white showing] and the over-dress [the blue]
For the over-dress, create the cups in blue, and attach the modified pattern piece for the bodice/skirt to the cups. Leave the front open. Create a simple shift style dress to wear underneath.
Otherwise, you will have to attach the blue cups to the over dress and create a lining as the under dress. Attach blue ribbon over top of the seamline, and tie a bow in the front.
The sleeves are modified crescent shape, with a straight edge inside of the inner curve, similar to a half circle, although with a very narrow radius.
does that make sense?
i noticed that this tutorial has how to make the sleeves, exactly. https://www.craftster.org/forum/index.php?topic=170402.0