Sterling Insulated Wire Company (STERCO) produced High-Grade Multi-Strand and Magnet Wire. They were chartered in 1923 by the Deputy Secretary of State, with capital of 500 shares of stock without par value. They will deal in machinery, wire and electrical supplies. The incorporators were William Shardlow, Frances J Brady and Harold W Thatcher. ² and lost that charter in 1932 ¹

Providence Journal July 20, 1924

Providence Journal September 21, 1924

Providence Journal October 5, 1924

Pawtucket Times September 5, 1925

US1433242 Core Winding Machine

Providence Journal October 30, 1922

¹ Providence Journal December 27, 1932

² Providence Journal April 11, 1923