Guardian Service cookware was originally manufactured in the United States. The company began in 1923 by two brothers, Harry and Max Rosenzweig, who wanted to build a better quality of aluminum ware for their own kitchen. Their first pieces were made from “lightweight aluminum” which was lighter than traditional cast iron or steel pans. Guardian Service cookware quickly became popular due to its superior heat conduction and durability compared to other materials available at the time. Over the years, production operations moved across various states including California, New York and Texas before ultimately settling in Buffalo, New York where they continued producing high-quality products until 1977 when it ceased all manufacturing operations in the US. Although no longer produced domestically today, Guardian Service cookware remains highly sought after due to its timeless design and exceptional performance that has stood up over time.