Item #: 564177 This is an authentic TIFFANY Sterling Silver Nike Marathon DC 2013 Dog Tag Pendant Necklace. This limited edition Nike Women's Half Marathon necklace is crafted of sterling silver and features dog tag pendant designed with an image of a female runner. This is a beautiful necklace with the signature style of Tiffany! Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.