19th Century French Facetted Link Gold Necklace

Napoleon III period, facetted link collar necklace. French in origin with halmarks. Circa 1860. 18k rose gold.  Can be wrapped as a bracelet for a small wrist. 

The necklace has two clasps, one hidden push clasp, and a clever facetted hinged clasp. Measures 15.50" in total length.