Plate brooch in 750 thousandths pink gold and 850 thousandths platinum, with openwork and geometrical decoration, set with fifteen old brilliant-cut diamonds, the main one approx. 0.75 ct, pump clasp. French work circa 1940. Total estimated diamond weight: 1.30 ct Height 2.4 cm - Width: 4.6 cm Gross weight: 18.3 g