Exceptional Art Deco necklace in platinum, set with a large 5.10 ct old-cut pear-shaped diamond in F color, SI2 clarity, the choker set with navette-cut old-cut and 8/8 baguette-cut diamonds totaling approx. 12 to 13 ct. The removable tassel transforms the necklace into a choker. Ratchet clasp in 750°/°°(18K) white gold. Early 20th century. Certificate from the Laboratoire Français de Gemmologie for the pear-shaped diamond. 35.60 g. L: 38 cm. Center length: 4.3 cm. Dog head and eagle head hallmarks