Very large rendition of Goodall Worster Mills in Sanford, ME

Not sure if this is an architect's rendering, there is no signature or marking other than a handwritten note beneath the pictures that says Sanford Industries, Sanford, ME. the cars appear to be from the 1920's or early 30's. Very large board is 5-1/2 feet wide and stands 33 inches tall. It is actually four posters that are mounted on cardboard and it seems as though the blue sky above has been painted on. Very cool in person! The history behind these mills is that Thomas Goodall established the Goodall Mills in 1867, producing carriage robes and blankets after closing another factory in Troy, NH that made horse blankets. He later produced upholstery textiles. From 1880 to 1910 the population of Sanford tripled with mill workers moving into houses that were built by the Goodall company. In 1954 the mills were sold to Burlington Mills. SOLD!