Is all vintage Tiffany jewelry stamped?

Yes, nearly all vintage Tiffany jewelry is stamped. However, the stamp on older pieces may not include the maker's name. You should still find a hallmark that represents the metal’s purity. Examples include 925, AG925 or STER for sterling silver. Find a variety of Tiffany & Co. jewelry from some of the world's top sellers on 1stDibs.