This is an authentic TIFFANY 18K Yellow Gold Diamond 21mm Resonator Quartz Watch. This classic Swiss made watch is crafted of 18K yellow gold with Roman numeral hour markers and framed by a diamond bezel. Wear this watch for the classic style of Tiffany! Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.