An antique American Calumet Baking Powder Butter Eggs cardboard advertising and pricing sign. The sign is adorned with printed images of a child, a cake, and a Calumet powder jar. The sign is inscribed, Bake With Calumet The Worlds Greatest Baking Powder, lower left. Completed with revolving wheels for the numbers. Circa: late 19th century to early 20th century. The Calumet Baking Powder Company was an American food company established in 1889 in Chicago, Illinois, by salesman William Monroe Wright to manufacture baking powder. Calumet operated independently until it was acquired by General Foods in 1929. Antique and Vintage American Advertising Signs For Collectors.