This is not your average flat Greek Key necklace; it is a Greek Box Link (also known as a Meander Box). Unlike standard flat-stamped chains, this is a three-dimensional Venetian-style box chain where each link is precision-angled to create the "Meandros" pattern from every side. It has a substantial weight of 15.56 grams, giving it a heavy, luxury feel that far exceeds thinner versions. Measures 21" in length.  Very good condition.  Ships USPS.  Thanks for looking.