18 karat gold, diamond and ruby necklace, Boucheron, circa 1940

The double-strand tubular necklace with central knot, set with an oval-shaped diamond weighing approximately 1.15 carats within a cluster of round rubies, flanked by pair of openwork fan-shaped  ornaments studded with additional round rubies, further set with bands of small round diamonds, length approximately 15½ inches, signed Boucheron, Paris, assay marks.