Cartier, an Art Deco natural pearl and diamond brooch, 1920s, of bar design, set with rose-cut

Cartier, an Art Deco natural pearl and diamond brooch, 1920s, of bar design, set with rose-cut diamonds and natural pearls, mounted in platinum with millegrain borders, length 8.5cm, signed Cartier Paris Londres New York, French assay mark for platinum, partial French maker's mark, possibly GH with chariot for Georges Harnichaud

Accompanied by report numbers 80271-34 and 5785-0498 from GCS, stating that the pearls are natural saltwater