An original color advertising poster for Chicago, Milwaukee, St. Paul & Pacific Railroad that has been dry mounted to foam core backing and measures 19 7/8 x 25 7/8". The advertisement dates from the 1920s and details American's Longest Electrified Railroad, The Milwaukee Road Electrified over the Rockies to the Sea. The poster shows stain specks across the graphics, stain spots at the bottom left, top right, and along the edges. A 1" vertical tear in the center blue circle to the left of the bottom lightning bolt, mild edge and corner wear. See photos for best description.