An excellent mid weight antique chain, with flat edge belcher links and a matching hing flat edge dog clip. 
There is also a little stamped 9ct tag on the end link, as well as a facetted jump ring. 
Stamped and tested as 9ct gold 
Weight approx 13.43g 
Length approx 18 inches 
Width approx 4mm 
Excellent antique condition, dog clip works well and swivels.