Art Déco brooch with 3 natural pearls

Art Deco brooch with 3 probably natural pearls and 4 old-european-cut diamonds totalling ca. 0.60 ct, centrally each diamond ca. 0.20 ct, ca. WHITE (H)/P, cultured pearls: slightly cream-white, fine luster, slightly oval shape, D: ca. 4.4 - 5.5 mm, 14K yellow gold, 4,5 g, faceside platinum, L: ca. 56.1 mm, W: ca. 5.5 mm, around 1910/20, good condition for its age, pin on the back bent.