Jean Bondt workshop (attributed to) Brooch in 18K 750 thousandths yellow gold and 850 thousandths platinum decorated with openwork ribbons twirling in an S-shape, the platinum bow set with three 8/8 star-cut diamonds. Pin with safety pump. French hallmark J - T geometric or hammer - B Dimensions: 55 x 25 mm - Gross weight: 7 g Expert's note: the Atelier de Jean Bondt is known to be one of the Boucheron and Sterlé workshops, active at 189 rue Ordener then 41 rie Saint Augustin in Paris, from 1947.