Set of serpentine necklace and Art Déco jewelry piece

Bundle of serpentine necklace and Art Déco jewellery part with old-european-cut diamonds totall. c. 0.3 ct, palladium, 3.4 g, 4 x 1 cm, both sides with hooks (usable as clasp), bead necklace, graduating from 4.5 to 8.5 mm, L: 65 cm, clasp made of base metal, 20th century, signs of wear.