925 Italy 3-Row Flat Back Rounded Top Link Chain Necklace 18" Long Lobster Clasp

925 Italy 3-Row Flat Back Rounded Top Link Chain Necklace 18" Long Lobster Clasp Link chain necklace, marked "925 ITALY" on the clasp. I don't know the name of the type of chain, but the links are flat on the back and rounded on top - like a half-circle. They are in three rows, alternating 2 per row and 1 per row. Lobster clasp. Measures almost 18" in length. Weighs approximately 23g on my kitchen scale. No dents, dings, chips, etc. Could use a polishing by the Buyer.