Robuta

https://www.sothebys.com/en/auctions/ecatalogue/2017/fine-jewels-l17051/lot.4.html (#4) Diamond brooch/collier de chien, early 20th century collier de chien diamond brooch 4 early 20th https://www.sothebys.com/en/buy/auction/2021/fine-jewels-5/seed-pearl-diamond-and-emerald-collier-de-chien Seed pearl, diamond and emerald collier de chien (Collana in collier de chien seed pearl diamond emerald collana https://www.sothebys.com/en/auctions/ecatalogue/2014/fine-jewels-l14051/lot.4.html (#4) Natural pearl and diamond collier de chien, early 20th century pearl and diamond collier de chien 4 natural