Vintage Trifari TM gold and black twist rope style necklace

Vintage Trifari TM gold and black twist rope style necklace . has a nice weight 16 grams according to my kitchen scale. The black part appears to a cloth material not metal like the gold tone part. Measures ~ 16" ruler in pics above, questions are always welcome mannequin;'s neck measures ~ 15" pic 11 is a close up of measuring tape around the mannequin's neck. Had this since the 80's . Good used condition . The hallmark on the back reads "Trifari TM" and the metal tag is what you clip the one end onto.