Pearl necklace with brilliant-cut diamond bayonet clasp,

Necklace made from fresh water cultured pearls 8 mm, L: 42 cm, bayonet changing clasp made of 18K white gold, 4.2 g D: 9.5 mm, with brilliant-cut diamond ca. 0.07 ct, ca. RW-WHITE (G-H)/VS-SI, 20th/21st century, minor signs of wear.