Necklace river in yellow gold (hallmark cock... Lot 2

Necklace river in yellow gold (hallmark cock head 1809-1819) and silver consisting of 59 links in fall set with alternating old-cut diamonds and other links set with four diamonds forming a quadrilobe old-cut, the clasp punched and numbered 16 4 set with an oval old-cut diamond. Provençal work of the first quarter of the XIXth century, length: 51 cm (we join 5 detached links decorated with old cut diamonds), total weight: 22,6 g. The whole for more than 10 carats (central diamond of approximately 1,5 ct)