21K yellow gold 3.0mm Fancy bar & cable link necklace 16 7/8"

Circa 1980-1990, this fancy necklace crafted in solid 21K yellow gold, no assay mark, XRF analyzer tested.
It has 3.0mm longette link and alternate with cable link. Spring ring clasp. 16 7/8" long, weight 6.0gm