The Tiffany & Co. G&W 550 Broadway NY mark appears on very early pieces produced by Tiffany & Co. during its partnership with Gale & Willis (G&W), dating to the early 1850s. The address 550 Broadway, New York was Tiffany’s headquarters from 1854 to 1870, marking an important period in the company’s early expansion. Pieces with this mark are often made of coin silver rather than sterling and are highly sought after for their historical importance, rare partnership attribution, and early American craftsmanship.