Plate brooch in 750 thousandths white gold and 850 thousandths platinum, with geometric and openwork decoration, set with one hundred and eighty-five old brilliant-cut diamonds and ten baguette-cut diamonds, the main one approx. 0.70 ct, pump clasp. French work of the Art Deco period. Estimated total diamond weight: 6.50 ct Height 3.5 cm - Width: 7 cm Gross weight: 32.4 g Accompanied by its case.