Art Déco brooch with old-cut diamonds totaling approx. 5 ct,

Art Déco brooch with old-european-cut diamonds totalling ca. 5 ct, of which the central 3 totalling ca. 1 ct, ca. WHITE (H)/SI and the others totalling ca. 4 ct, ca. STW (I-J)/VS-I1, platinum 10.9 g, harmonious mariage of different parts, partly with decorative engravings and millegriffes, 1st half of 20th century, good condition.