Illustration of a person made of bread wearing a bakers hat and a white apron with black text on it, all on a blue background
BASTIAN BROS. CO. Mfrs. of Cellulois Novelties Rochester, NY
BASTIAN BROS CO ROCHESTER NY.
This button is advertising Fleishmann's Yeast which is a brand of yeast sold to both consumer and industrial markets in the United States and Canada. The company was founded by Charles Louis Fleischmann, his brother Maximillian, and James Gaff in 1868. It is currently owned by Associated British Foods.
Since yeast is a common ingredient in breads, this button plays on the word "dough." John Dough is alluding to the placeholder name John Doe which is commonly used for a man whose true identity is unknown or must be withheld in a legal action, case, or discussion. It can also be used to refer to a corpse or hospital patient whose identity is unknown.