Plate brooch in platinum 850°°°, with geometrical and openwork decoration, entirely set with one hundred and thirty-nine old baguette-cut and brilliant-cut diamonds, the main one approximately 0.70 ct, pump clasp. Art Deco period, 1930s. Estimated total weight of diamonds: 5 ct Height 3.4 cm - Width: 5.8 cm Gross weight: 21.6 g