This item is a Sterling Silver 925 Fancy Herringbone Chain.
The length of this necklace is 17" and the width is 3mm.
The weight of this chain on a jewelry scale is 6.6 grams.
At the clasp it reads "925 Italy" and "M" as pictured.
This necklace is part of a large estate jewelry collection.
Please see pictures for up close views from all sides...