Back cover advertisement, booklet Plate Progress from the Jahn & Ollier Engraving Co. of Chicago (1920s).
The front cover is as colorful as this image, and shows a naked man carving letters into a stone tablet using a mallet and chisel.
This booklet claimed: “The Jahn & Ollier reproductions in color have popularized the masterpieces of the Art Institute of Chicago. Our color plates have sold… and are proving themselves profitable investments.”