This is an authentic TIFFANY Sterling Silver 1837 Circle Lock Necklace. The necklace is crafted of sterling silver and features a circle lock pendant engraved with the Tiffany 1837 logo. This is a lovely necklace with the unforgettable style only from Tiffany! Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.