Tiffany & Co. 18k Yellow Gold Sea Urchin Pin, circa 1960s Consign Now DeptJewelrySizeDiameter 1 ½ in. 26.58 dwt Tiffany & Co. 18k Yellow Gold Sea Urchin Pin, circa 1960s, stamped Tiffany & Co. 18k, 26.58 dwt Diameter 1 ½ in. 26.58 dwt Please note that this auction has ended. Click here for an overview of this auction.