Postcard showing an aerial drawing of the Postum Cereal Company factory complex, c. 1921 Caption on front: Pure Food Factories of Postum Cereal Co., Battle Creek, Mich. U.S.A. Where Postum, Instant Postum, Grape-Nuts and Post Toasties are made probably the largest cereal pure food factories in the world. "There's a Reason." Written on front: Went through all this Aug- 29th 1921