Item #: 1877831 This is an authentic TIFFANY Sterling Silver Rubedo 1837 Interlocking Circles Pendant Necklace. The necklace is crafted of sterling silver and Rubedo metal and features two interlocking rings engraved with the signature '1837 T&Co' logo. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.