I have never seen this Aigrette of Q Mary before. I recently bought this postcard and know nothing about it. It must have been made at the beginning of the 20th century. In "Cartier"by Hans Nadelhoffer are some aigrettes made in 1912/1913 by Cartier. I wonder if this piece is still hidden in the royal faults.
For the rest of the jewelry I only recognize the bracelet and the earrings. The flowerbrooch could be a part of the flowertiara of prss Margareth. The dogcollar with the ruby stones is new to me and also the tassel brooches. Does anybody has some information of these pieces?