Interior of elevators inside Book building. Elevators have ornate decoration on ceiling and sides; rectangular mirrors hang on walls. Printed on front: "The Book building, Detroit. Shop elevators." Printed on back: "The Book building, Washington Blvd., Detroit, Mich. The shop elevators in the Book building are the most beautiful elevators in Detroit. For the exclusive use of shoppers only having no connection with the offices in the building which have an entirely separate elevator system. The elevator doors and enclosures are bronze and steel finish. C.T. Co., Chicago, R-68934." Handwritten on back in upper right corner: "1/27/28."