From eBay. The entire upper edge was patched using Photoshop.
Olga again poses wearing jewels and formal dress with several order bows and a diamond brooch. That brooch may be a currant-leaf motif jewel from the sale of France's crown jewels by the Third Republic (see Chapter 1 of Diamonds - A Century of Spectacular Jewels by Penny Proddow and Marion Fasel, Harry S. Abrams Publishers, New York (1996) that covers the sale of France's crown jewels).
Keywords: Olga Konstantinovna, Grand Princess, Queen, Romanov family, Glucksberg family, Greek, straight coiffure, tiara, off shoulder vee neckline, cap sleeves, lace, order star, order bows, necklace, brooch, robes