Authentic c1960 Tiffany & co. Sterling Silver Onyx beads necklace 30" 78.1gm

c1960's authentic Tiffany & Co Vintage Sterling Silver & Black Onyx Single Strand Necklace. Forty-eight (48) 10.0mm black onyx alternate with 8.00mm sterling round bead. This stunning necklace has a small round tag that is engraved with the old Tiffany hallmark: T & CO STERLING, with a round corner square tag, it engraved ©Tiffany & CO. Sterling on one side, with Tiffany logo at the other side. It weighs 78.1gm, 30" long. It has been beautifully cared for and is in excellent to mint condition. It comes with a replacement Tiffany pouch.