Early Czech Snake Pendant Necklace (Neiger?)

Brass Ornate oval pendant with a detailed snake design and diamond shaped cabochon. Matching brilliant royal blue glass beads- spherical and rounded cubes. Part of the necklace is hand strung and there is no clasp- flapper length. There is some distortion to the brass filigree bead ball on one side of the necklace. Hand Knotted. The back of the pendant has a hammered-like texture. There is a small bubble in the cabochon that adds to the uniqueness of the piece. the necklace has a 28" Length (56") and a 2 inch pendant which reached to 3" with the dangle. Butterfly necklac in the final photo is not included. Czech 1920s-1930s.