This silver-tone large link vintage choker necklace measures 17 inches long by 1 inch wide.  It has a snap over closure.
This type of open oval links with an s-swirl design has not been made since the 1940's or 1950's.  It is truly unique and definitely not to be found anymore.  
Although not signed, it has a designer look and quality.   
The necklace is in nice vintage condition, but could use a little cleaning.
        
          
          
Vintage Choker Necklace Open Swirl Large Link  Silver Tone listed in:
          
            All Vintage Jewelry
            , Vintage Necklaces