From the Collection of Princess Maria Immacolata of Bourbon-Two Sicilies, Archduchess of Austria-Tuscany (1844–1899)Natural pearl and di

Blister pearl and diamond brooch, circa 1860Set with with a slightly baroque button-shaped blister pearl measuring approximately 21.20 -

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From the Collection of Archduchess Marie Therese of Austria-Teschen, Duchess of Württemberg (1845-1927)Superb natural pearl and diamond

Provenance Archduchess Marie Valerie of Austria and heirs, gold 585, silver c. 800, 6 Oriental pearls partly baroque shape, diameter c. 7.5-12.2 mm, old-cut brilliants and diamonds, diamond rhombs total weight c. 18 ct, some movable elements, detachable pin, workmanship c. 1890, executed by A. E. Köchert, 41.9 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…