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Cartiersapphire and diamondjabot pin. Set with two oval cabochonnatural unenhanced sapphires in open backrubover settings with a combined approximate weight of 5.00 carats, surrounded by thirty six round eight cutdiamonds in open back grain settings with a combined approximate weight of 0.90 carats, to an elegant jabot pin featuring two oval clusters at either end with decorative millegrain borders, open linear galleries and fancy open backholing, connected by an elegant single central pin, the lower cluster is detachable, approximately 6.8cm in length. Markedplatinum, maker's mark 'HG' for George Harnichard, signed 'CARTIER', numbered '9745', French, circa 1915, accompanied by fitted Cartier box.
George Harnichard specialised in fine diamond and coloured gemstone set platinum jewellery. The Harnichard workshop was one of the six jewellers who worked for Cartier in Paris between 1900-1918, the firm also created fine jewellery for the aristocracy of Europe before World War I.