Art Déco brooch with 1 old-cut diamond approx. 0.1 ct,

Art Déco brooch with 1 old-european-cut diamond ca. 0.1 ct, 2 single-cut diamonds totalling ca. 0.05 ct, ca. WHITE-STW (H-J)/SI-I1, rose-cut diamonds and sapphires (perhaps synthetic, 2 pieces missing), platinum 3.4 g, L: 5 cm, 1st third of 20th century, signs of wear.