While production of Chinese export porcelain beads dates back to the early 20th century, the vast majority of these specific hand-knotted fashion necklaces with gold-tone filigree metal clasps were produced and exported to global markets during the Chinoiserie style trends of the 1970s and 1980s The Clasp: The flat, textured oval push-in box clasp is characteristic of mid-to-late 20th-century costume and export jewelry craftsmanship.