From eBay; Wikimedia have another version of this image dated to 1917. Monocolor tint removed. Also posted to Marie Auguste of Anhalt’s Subalbum here.
Marie Auguste wears a jacket, over-bodice, or over-dress above a chemis with a ruffled neckline and sheer under-sleeves.
Keywords: 1917, Niederastroth, Princess Marie Auguste, Prinzessin Joachim, Ascania family, Hohenzollern family, Princes, German, straight coiffure, over-bodice, quarter length close over-sleeves, cuffs, under-bodice, trapezoidal décolletage, elbow length full under-sleeves, bracelets, close skirt