The Griswold Manufacturing Company was established in Erie, Pennsylvania in 1865 to manufacture door hinges that paved the way to become recognized for fine cast iron products world wide. During the next 92 years, their designers produced many patents. They eventually added a line of cast aluminum and enameled cookware. They also added electric items in the 1930’s. The company closed it’s doors in 1957 due to declining quality and competition from other manufacturers. This waffle iron, circa 1910 to 1940, makes a 7 1/2 inch round waffle.