Vintage Italian 18k yellow gold box link necklace measuring 27 3/4 inches in length. Attaches with spring ring.?ID#: NEC186Metal: 18k yellow gold?Weight: 14.3gLength: 27 3/4 inch?Width: 1.54 mmMarkings: '750', 'AR' (rest of Italian hallmark is faded), 'UNO A ERRE'