Provenance Archduchess Marie Valerie of Austria and heirs, gold 585, silver c. 800, 15 Oriental pearls partly baroque shape, diameter c. 7-8.8 mm, old-cut brilliants and diamonds, diamond rhombs total weight c. 25 ct, workmanship c. 1890/95, designed by Wilhelm Haarstrick, metal carcasse, 131.2 g, in fitted case, Royal & Imperial Court and Chamber Jewellers A. E. Köchert, Neuer Markt 15, Vienna, material composition report of NHM Vienna from 2019 enclosed. X-ray fluorescence analysis has…