Plate brooch in 850 thousandth platinum and 750 thousandth white gold, with geometric and openwork decoration, entirely set with two hundred and nineteen old and baguette brilliant-cut diamonds (one missing), the largest approx. 0.45 ct. Art Deco period. Estimated total diamond weight: 2.30 ct Height 4.5 cm - Width: 2.3 cm Gross weight : 12 g Accompanied by a case signed E. Emin Joaillier fabricant 21 rue St Augustin PARIS.