Scope and ContentCheck stub for invoice payment: Keuffel & Esser Co., Hoboken, N.J., December 6, 1961. Printed stub with plant reference code and invoice amount; check number HO88820. With: printed no. 10 window business envelope imprinted: Keuffel & Esser Co., Adams and Third Streets, Hoboken, N.J. Postmarked Hoboken, Dec. 8, 1961. The plant code was 20, so this check was issued for an invoice related to the main offices and factory in Hoboken. The name of the company to whom the check was issued is not indicated. The plant code lists 26 locations. While it includes branch offices, it is indicative of the company's expansion outside Hoboken for manufacturing.