Authentic Tiffany Sterling Silver + Rubedo 1837 Interlocking Circles Necklace

Sterling silver and Rubedo Tiffany and Co. two tone, 1837 interlocking circles pendant necklace. It measures approximately 20 inches in length and the three circular rings measure approximately 15 mm, 18 mm and 19 mm in diameter. Authentic, purchased by me at Chicago Tiffany store. Worn only a few times. Comes with Tiffany pouch.