Color postcard showing machinery in the #20 Production Building at Post Products Division of General Foods, c. 1995 Caption on front: #20 Production Building, 1995 Caption on back: Shown on front is #1 Loaf Oven for Grape-Nuts; which started production in 1898. #20 Building produces: Grape-Nuts; Honeycomb; Alpha-Bits; Marshmallow Alpha-Bits; and Crispy Critters.