The Tiffany & Co Sterling Portugal mark appears on sterling silver items designed or sold by Tiffany & Co. and manufactured in Portugal. This mark confirms that the piece is made of genuine sterling silver and was produced under Tiffany's high standards of quality, using skilled Portuguese silversmiths. Tiffany has occasionally collaborated with international workshops for specific product lines, and Portugal is known for its excellent silver craftsmanship. This mark verifies both the brand and country of origin, making it a key identifier for collectors tracking Tiffany’s globally sourced pieces.