CARTIER - YEARS 1915-1920 MAGNIFICENT POMPOM AND BAYADÈRE NECKLACE The pompom bears multiple rows of seed pearls enhanced by small onyx balls. The base is paved on two registers with round diamonds enhanced by two onyx discs and small square onyx cabochons. The whole is topped with a large half-pearl, presumed to be fine. Platinum hanger, platinum mounting (small metal plate with 18K yellow gold screw). French work inscribed CARTIER and numbered. Hallmark of Gustave Renault for the pompom pendant, unsigned work of a MD manufacturer for the bayadère necklace. Gross weight: 39.41 g (three strands of pearl and onyx seeds are attached, minor accidents). Total height (including clasp): approx. 10.2 cm. Size of the bayadère necklace: approx. 0.9 x 74 cm. Period jewellery box. Reference : Catalogue "CARTIER" Grand Palais Paris, December 2014, pages 151, is presented a drawing of a décolleté brooch dated 1925 and page 153, a seed pompon brooch of fine pearls, onyx and emeralds dated 1924. Bachet Olivier "Au commencement était le trait", Palais-Royal 2024, where on the cover a gouache drawing of a fine pearl pompon is reproduced, also on page 157, dated 1922. In "La collection Cartier", Flammarion, 2018, a coral, pearl and onyx pendant dated 1922 is reproduced on page 306. A metal plate with 18K yellow gold pompom and necklace by Cartier, circa 1915-1920. Carved CARTIER and numbered. Maker's mark of Gustave Renault for the pompom pendant, and MD maker's mark for the necklace. Gross weight : 39,41 gr. Total height : 10,2 cm. approx. Necklace dimensions : 0,9 x 74 cm. approx.