43 - French Art Deco-era piece

French Art Deco-era piece Oval “Stylized Palmettes” brooch in 950‰ platinum with an openwork geometric design entirely adorned with old-cut and 8/8 diamonds, including a larger central stone, all set in a beaded closed setting. Pin in 750‰ white gold with a safety safetypin clasp. Rhomboid workshop hallmark and traces of serial numbering. Weight of the main diamond: approximately 0.30 carats. Dimensions: 2.3 x 4.7 cm. Gross weight: 10.3 g. (Traces of soldering on the reverse, a few small chips).