Estate Tiffany & Co Ziegfield Sterling Silver Black Onyx Pearl 24 Inch Long Statement Necklace. This elegant necklace is fully engraved: TIFFANY & CO AG 925 on the plate at the clasp. The clasp is engraved: 925. It measures 24 inches long and weighs 9.8 grams. The pendant measures 1.5 inches long X .76 inch wide. It comes in its Tiffany box and pouch. Please visit my ebay store for unique estate jewelry. Thank you.