Bold statement collar necklace made of 10 large links. They are light enough weight, so I find it pretty comfortable to wear. It is Gold tone and I'm not seeing any tarnishing. It wasn't worn much. There is a tiny spot where the finish is worn.

The links are larger in the center front. They are about 1 1/2" wide in the front and about 3/4" wide in the back.  It looks wavy or twisted, maybe braided rope.  

Box clasp 

It measures about 18” around. It's from the 80's and is unbranded.  Very nice quality.