The Tiffany & Co. 1587 2491 mark appears on sterling silver pieces created by Tiffany & Co., one of America's most prestigious silver manufacturers. The numbers 1587 and 2491 are pattern or design numbers, assigned to track specific styles or orders within Tiffany’s extensive catalog. This dual-numbering format was part of Tiffany’s meticulous system for documenting and authenticating its pieces. Items bearing this mark are valued for their fine craftsmanship, elegant design, and traceable place within Tiffany’s long history of producing luxury silverware.