c. 1918; postmarked 1920; shows plant no. 1 at Clark Avenue and West Jefferson Street and plant no. 3 at Brush and Piquette Avenues; "The Studebaker Corporation owns and operates one of the largest and most completely equipped plants in the automobile industry. It employs in the neighborhood of 10,000 men and the production capacity of the plants is 50,000 automobiles a year. This is one of the few companies which builds practically every part that goes into the car."